15713891 has 2 divisors, whose sum is σ = 15713892. Its totient is φ = 15713890.

The previous prime is 15713861. The next prime is 15713909. The reversal of 15713891 is 19831751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15713891 - 2²² = 11519587 is a prime.

It is not a weakly prime, because it can be changed into another prime (15713821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7856945 + 7856946.

It is an arithmetic number, because the mean of its divisors is an integer number (7856946).

Almost surely, 2^15713891 is an apocalyptic number.

15713891 is a deficient number, since it is larger than the sum of its proper divisors (1).

15713891 is an equidigital number, since it uses as much as digits as its factorization.

15713891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 35.

The square root of 15713891 is about 3964.0750497436. The cubic root of 15713891 is about 250.4731891364.

The spelling of 15713891 in words is "fifteen million, seven hundred thirteen thousand, eight hundred ninety-one".