87691923 has 16 divisors (see below), whose sum is σ = 141724800. Its totient is φ = 53146440.

The previous prime is 87691913. The next prime is 87691931. The reversal of 87691923 is 32919678.

It is a de Polignac number, because none of the positive numbers 2^k-87691923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87691913) 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, 147333 + ... + 147926.

It is an arithmetic number, because the mean of its divisors is an integer number (8857800).

Almost surely, 2^87691923 is an apocalyptic number.

87691923 is a deficient number, since it is larger than the sum of its proper divisors (54032877).

87691923 is a wasteful number, since it uses less digits than its factorization.

87691923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295279 (or 295273 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 87691923 is about 9364.3965635806. The cubic root of 87691923 is about 444.2763527935.

The spelling of 87691923 in words is "eighty-seven million, six hundred ninety-one thousand, nine hundred twenty-three".