87509957 has 4 divisors (see below), whose sum is σ = 87626316. Its totient is φ = 87393600.

The previous prime is 87509951. The next prime is 87509977. The reversal of 87509957 is 75990578.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77986561 + 9523396 = 8831^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 87509957 - 2¹⁰ = 87508933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87509951) 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, 57044 + ... + 58557.

It is an arithmetic number, because the mean of its divisors is an integer number (21906579).

Almost surely, 2^87509957 is an apocalyptic number.

It is an amenable number.

87509957 is a deficient number, since it is larger than the sum of its proper divisors (116359).

87509957 is a wasteful number, since it uses less digits than its factorization.

87509957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116358.

The product of its (nonzero) digits is 793800, while the sum is 50.

The square root of 87509957 is about 9354.6756758318. The cubic root of 87509957 is about 443.9688399662.

The spelling of 87509957 in words is "eighty-seven million, five hundred nine thousand, nine hundred fifty-seven".