13087657 has 8 divisors (see below), whose sum is σ = 14333760. Its totient is φ = 11850960.

The previous prime is 13087649. The next prime is 13087687. The reversal of 13087657 is 75678031.

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

It is not a de Polignac number, because 13087657 - 2³ = 13087649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13087687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 748 + ... + 5170.

It is an arithmetic number, because the mean of its divisors is an integer number (1791720).

Almost surely, 2^13087657 is an apocalyptic number.

It is an amenable number.

13087657 is a deficient number, since it is larger than the sum of its proper divisors (1246103).

13087657 is a wasteful number, since it uses less digits than its factorization.

13087657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 13087657 is about 3617.6866917963. The cubic root of 13087657 is about 235.6607749623.

The spelling of 13087657 in words is "thirteen million, eighty-seven thousand, six hundred fifty-seven".