13157289 has 8 divisors (see below), whose sum is σ = 19492320. Its totient is φ = 8771508.

The previous prime is 13157267. The next prime is 13157293. The reversal of 13157289 is 98275131.

13157289 is a `hidden beast` number, since 1 + 3 + 1 + 572 + 89 = 666.

It is not a de Polignac number, because 13157289 - 2⁸ = 13157033 is a prime.

It is a super-2 number, since 2×13157289² = 346228507659042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13157239) 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, 243627 + ... + 243680.

It is an arithmetic number, because the mean of its divisors is an integer number (2436540).

Almost surely, 2^13157289 is an apocalyptic number.

It is an amenable number.

13157289 is a deficient number, since it is larger than the sum of its proper divisors (6335031).

13157289 is an equidigital number, since it uses as much as digits as its factorization.

13157289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487316 (or 487310 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13157289 is about 3627.2977545275. The cubic root of 13157289 is about 236.0779750479.

The spelling of 13157289 in words is "thirteen million, one hundred fifty-seven thousand, two hundred eighty-nine".