87512497 has 4 divisors (see below), whose sum is σ = 87772516. Its totient is φ = 87252480.

The previous prime is 87512489. The next prime is 87512501. The reversal of 87512497 is 79421578.

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 9790641 + 77721856 = 3129^2 + 8816^2 .

It is a cyclic number.

It is not a de Polignac number, because 87512497 - 2³ = 87512489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87512407) 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, 129504 + ... + 130177.

It is an arithmetic number, because the mean of its divisors is an integer number (21943129).

Almost surely, 2^87512497 is an apocalyptic number.

It is an amenable number.

87512497 is a deficient number, since it is larger than the sum of its proper divisors (260019).

87512497 is a wasteful number, since it uses less digits than its factorization.

87512497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260018.

The product of its digits is 141120, while the sum is 43.

The square root of 87512497 is about 9354.8114358334. The cubic root of 87512497 is about 443.9731353629.

The spelling of 87512497 in words is "eighty-seven million, five hundred twelve thousand, four hundred ninety-seven".