87168772 has 6 divisors (see below), whose sum is σ = 152545358. Its totient is φ = 43584384.

The previous prime is 87168769. The next prime is 87168773. The reversal of 87168772 is 27786178.

It can be written as a sum of positive squares in only one way, i.e., 77018176 + 10150596 = 8776^2 + 3186^2 .

It is not an unprimeable number, because it can be changed into a prime (87168773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10896093 + ... + 10896100.

Almost surely, 2^87168772 is an apocalyptic number.

It is an amenable number.

87168772 is a deficient number, since it is larger than the sum of its proper divisors (65376586).

87168772 is a wasteful number, since it uses less digits than its factorization.

87168772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21792197 (or 21792195 counting only the distinct ones).

The product of its digits is 263424, while the sum is 46.

The square root of 87168772 is about 9336.4217985265. The cubic root of 87168772 is about 443.3911045876.

The spelling of 87168772 in words is "eighty-seven million, one hundred sixty-eight thousand, seven hundred seventy-two".