87573979892 has 24 divisors (see below), whose sum is σ = 175209855744. Its totient is φ = 37518442272.

The previous prime is 87573979891. The next prime is 87573979939. The reversal of 87573979892 is 29897937578.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87573979891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471788 + ... + 630659.

It is an arithmetic number, because the mean of its divisors is an integer number (7300410656).

Almost surely, 2^87573979892 is an apocalyptic number.

It is an amenable number.

87573979892 is an abundant number, since it is smaller than the sum of its proper divisors (87635875852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87573979892 is a wasteful number, since it uses less digits than its factorization.

87573979892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105295 (or 1105293 counting only the distinct ones).

The product of its digits is 480090240, while the sum is 74.

The spelling of 87573979892 in words is "eighty-seven billion, five hundred seventy-three million, nine hundred seventy-nine thousand, eight hundred ninety-two".