87892131 has 32 divisors (see below), whose sum is σ = 126950400. Its totient is φ = 53944704.

The previous prime is 87892121. The next prime is 87892139. The reversal of 87892131 is 13129878.

It is not a de Polignac number, because 87892131 - 2⁶ = 87892067 is a prime.

It is a super-2 number, since 2×87892131² = 15450053383442322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87892131.

It is not an unprimeable number, because it can be changed into a prime (87892139) 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, 441570 + ... + 441768.

It is an arithmetic number, because the mean of its divisors is an integer number (3967200).

Almost surely, 2^87892131 is an apocalyptic number.

87892131 is a deficient number, since it is larger than the sum of its proper divisors (39058269).

87892131 is a wasteful number, since it uses less digits than its factorization.

87892131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435.

The product of its digits is 24192, while the sum is 39.

The square root of 87892131 is about 9375.0803196559. The cubic root of 87892131 is about 444.6142025105.

The spelling of 87892131 in words is "eighty-seven million, eight hundred ninety-two thousand, one hundred thirty-one".