87156377 has 16 divisors (see below), whose sum is σ = 110979072. Its totient is φ = 66466320.

The previous prime is 87156371. The next prime is 87156403. The reversal of 87156377 is 77365178.

It is a cyclic number.

It is not a de Polignac number, because 87156377 - 2¹² = 87152281 is a prime.

It is a super-2 number, since 2×87156377² = 15192468103532258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87156371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8423 + ... + 15660.

It is an arithmetic number, because the mean of its divisors is an integer number (6936192).

Almost surely, 2^87156377 is an apocalyptic number.

It is an amenable number.

87156377 is a deficient number, since it is larger than the sum of its proper divisors (23822695).

87156377 is a wasteful number, since it uses less digits than its factorization.

87156377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24148.

The product of its digits is 246960, while the sum is 44.

The square root of 87156377 is about 9335.7579767258. The cubic root of 87156377 is about 443.3700875302.

The spelling of 87156377 in words is "eighty-seven million, one hundred fifty-six thousand, three hundred seventy-seven".