87574779 has 6 divisors (see below), whose sum is σ = 126496916. Its totient is φ = 58383180.

The previous prime is 87574763. The next prime is 87574807. The reversal of 87574779 is 97747578.

It is not a de Polignac number, because 87574779 - 2⁴ = 87574763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87574759) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4865257 + ... + 4865274.

Almost surely, 2^87574779 is an apocalyptic number.

87574779 is a deficient number, since it is larger than the sum of its proper divisors (38922137).

87574779 is a wasteful number, since it uses less digits than its factorization.

87574779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730537 (or 9730534 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 54.

The square root of 87574779 is about 9358.1397189826. The cubic root of 87574779 is about 444.0784345242.

It can be divided in two parts, 875747 and 79, that added together give a triangular number (875826 = T₁₃₂₃).

The spelling of 87574779 in words is "eighty-seven million, five hundred seventy-four thousand, seven hundred seventy-nine".