87268521 has 4 divisors (see below), whose sum is σ = 116358032. Its totient is φ = 58179012.

The previous prime is 87268513. The next prime is 87268523. The reversal of 87268521 is 12586278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87268521 - 2³ = 87268513 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 87268521.

It is not an unprimeable number, because it can be changed into a prime (87268523) 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, 14544751 + ... + 14544756.

It is an arithmetic number, because the mean of its divisors is an integer number (29089508).

Almost surely, 2^87268521 is an apocalyptic number.

It is an amenable number.

87268521 is a deficient number, since it is larger than the sum of its proper divisors (29089511).

87268521 is a wasteful number, since it uses less digits than its factorization.

87268521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29089510.

The product of its digits is 53760, while the sum is 39.

The square root of 87268521 is about 9341.7621999278. The cubic root of 87268521 is about 443.5601672719.

The spelling of 87268521 in words is "eighty-seven million, two hundred sixty-eight thousand, five hundred twenty-one".