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1230113287 = 13109868111
BaseRepresentation
bin100100101010010…
…0000101000000111
310011201200020012101
41021110200220013
510004402111122
6322021332531
742324535054
oct11124405007
93151606171
101230113287
11581404357
122a3b67147
13167b08bb0
14b952c02b
1572ed8027
hex49520a07

1230113287 has 8 divisors (see below), whose sum is σ = 1336892480. Its totient is φ = 1125070560.

The previous prime is 1230113249. The next prime is 1230113293. The reversal of 1230113287 is 7823110321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1230113287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230113207) 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 7 ways as a sum of consecutive naturals, for example, 432639 + ... + 435472.

It is an arithmetic number, because the mean of its divisors is an integer number (167111560).

Almost surely, 21230113287 is an apocalyptic number.

1230113287 is a deficient number, since it is larger than the sum of its proper divisors (106779193).

1230113287 is a wasteful number, since it uses less digits than its factorization.

1230113287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868233.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1230113287 is about 35072.9708892760. The cubic root of 1230113287 is about 1071.4741630894.

The spelling of 1230113287 in words is "one billion, two hundred thirty million, one hundred thirteen thousand, two hundred eighty-seven".

Divisors: 1 13 109 1417 868111 11285443 94624099 1230113287