87513257 has 8 divisors (see below), whose sum is σ = 94469760. Its totient is φ = 80588880.

The previous prime is 87513227. The next prime is 87513269. The reversal of 87513257 is 75231578.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87513257 - 2⁶ = 87513193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87513257.

It is not an unprimeable number, because it can be changed into a prime (87513227) 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, 2207 + ... + 13412.

It is an arithmetic number, because the mean of its divisors is an integer number (11808720).

Almost surely, 2^87513257 is an apocalyptic number.

It is an amenable number.

87513257 is a deficient number, since it is larger than the sum of its proper divisors (6956503).

87513257 is a wasteful number, since it uses less digits than its factorization.

87513257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16063.

The product of its digits is 58800, while the sum is 38.

The square root of 87513257 is about 9354.8520565533. The cubic root of 87513257 is about 443.9744205836.

The spelling of 87513257 in words is "eighty-seven million, five hundred thirteen thousand, two hundred fifty-seven".