87164457 has 32 divisors (see below), whose sum is σ = 135198720. Its totient is φ = 49547520.

The previous prime is 87164453. The next prime is 87164479. The reversal of 87164457 is 75446178.

It is not a de Polignac number, because 87164457 - 2² = 87164453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87164453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20332 + ... + 24242.

It is an arithmetic number, because the mean of its divisors is an integer number (4224960).

Almost surely, 2^87164457 is an apocalyptic number.

It is an amenable number.

87164457 is a deficient number, since it is larger than the sum of its proper divisors (48034263).

87164457 is a wasteful number, since it uses less digits than its factorization.

87164457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973.

The product of its digits is 188160, while the sum is 42.

The square root of 87164457 is about 9336.1907114197. The cubic root of 87164457 is about 443.3837882664.

The spelling of 87164457 in words is "eighty-seven million, one hundred sixty-four thousand, four hundred fifty-seven".