87531764 has 6 divisors (see below), whose sum is σ = 153180594. Its totient is φ = 43765880.

The previous prime is 87531757. The next prime is 87531797. The reversal of 87531764 is 46713578.

It can be written as a sum of positive squares in only one way, i.e., 86304100 + 1227664 = 9290^2 + 1108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10941467 + ... + 10941474.

It is an arithmetic number, because the mean of its divisors is an integer number (25530099).

Almost surely, 2^87531764 is an apocalyptic number.

It is an amenable number.

87531764 is a deficient number, since it is larger than the sum of its proper divisors (65648830).

87531764 is a wasteful number, since it uses less digits than its factorization.

87531764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21882945 (or 21882943 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 87531764 is about 9355.8411700926. The cubic root of 87531764 is about 444.0057151011.

The spelling of 87531764 in words is "eighty-seven million, five hundred thirty-one thousand, seven hundred sixty-four".