87377521 has 16 divisors (see below), whose sum is σ = 109440000. Its totient is φ = 67772880.

The previous prime is 87377513. The next prime is 87377579. The reversal of 87377521 is 12577378.

It is not a de Polignac number, because 87377521 - 2³ = 87377513 is a prime.

It is a super-2 number, since 2×87377521² = 15269662352210882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87377021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14980 + ... + 19978.

It is an arithmetic number, because the mean of its divisors is an integer number (6840000).

Almost surely, 2^87377521 is an apocalyptic number.

It is an amenable number.

87377521 is a deficient number, since it is larger than the sum of its proper divisors (22062479).

87377521 is a wasteful number, since it uses less digits than its factorization.

87377521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5244.

The product of its digits is 82320, while the sum is 40.

The square root of 87377521 is about 9347.5943964209. The cubic root of 87377521 is about 443.7447620621.

The spelling of 87377521 in words is "eighty-seven million, three hundred seventy-seven thousand, five hundred twenty-one".