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1405071313 = 13873101281
BaseRepresentation
bin101001110111111…
…1010111111010001
310121220220000111021
41103233322333101
510334144240223
6351231315441
746550623552
oct12357727721
93556800437
101405071313
11661142968
1233267bb81
13195135b59
14d4872329
158354765d
hex53bfafd1

1405071313 has 4 divisors (see below), whose sum is σ = 1405186468. Its totient is φ = 1404956160.

The previous prime is 1405071191. The next prime is 1405071329. The reversal of 1405071313 is 3131705041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3131705041 = 29107989829.

It can be written as a sum of positive squares in 2 ways, for example, as 259113409 + 1145957904 = 16097^2 + 33852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405071313 - 217 = 1404940241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405071713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36768 + ... + 64513.

It is an arithmetic number, because the mean of its divisors is an integer number (351296617).

Almost surely, 21405071313 is an apocalyptic number.

It is an amenable number.

1405071313 is a deficient number, since it is larger than the sum of its proper divisors (115155).

1405071313 is a wasteful number, since it uses less digits than its factorization.

1405071313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115154.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1405071313 is about 37484.2808787897. The cubic root of 1405071313 is about 1120.0380814539.

Adding to 1405071313 its reverse (3131705041), we get a palindrome (4536776354).

The spelling of 1405071313 in words is "one billion, four hundred five million, seventy-one thousand, three hundred thirteen".

Divisors: 1 13873 101281 1405071313