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1230406673 = 9971234109
BaseRepresentation
bin100100101010110…
…1000010000010001
310011202020010122112
41021111220100101
510004441003143
6322031515105
742330166316
oct11125502021
93152203575
101230406673
11581594821
122a4088a95
13167bac5b2
14b95a6d0d
1573044e18
hex49568411

1230406673 has 4 divisors (see below), whose sum is σ = 1231641780. Its totient is φ = 1229171568.

The previous prime is 1230406663. The next prime is 1230406699. The reversal of 1230406673 is 3766040321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 782153089 + 448253584 = 27967^2 + 21172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230406673 - 24 = 1230406657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1230406613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616058 + ... + 618051.

It is an arithmetic number, because the mean of its divisors is an integer number (307910445).

Almost surely, 21230406673 is an apocalyptic number.

It is an amenable number.

1230406673 is a deficient number, since it is larger than the sum of its proper divisors (1235107).

1230406673 is an equidigital number, since it uses as much as digits as its factorization.

1230406673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235106.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 1230406673 is about 35077.1531484526. The cubic root of 1230406673 is about 1071.5593396699.

Adding to 1230406673 its reverse (3766040321), we get a palindrome (4996446994).

The spelling of 1230406673 in words is "one billion, two hundred thirty million, four hundred six thousand, six hundred seventy-three".

Divisors: 1 997 1234109 1230406673