87933979 has 12 divisors (see below), whose sum is σ = 108308664. Its totient is φ = 70937664.

The previous prime is 87933977. The next prime is 87933983. The reversal of 87933979 is 97933978.

It is not a de Polignac number, because 87933979 - 2¹ = 87933977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87933977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51949 + ... + 53614.

It is an arithmetic number, because the mean of its divisors is an integer number (9025722).

Almost surely, 2^87933979 is an apocalyptic number.

87933979 is a deficient number, since it is larger than the sum of its proper divisors (20374685).

87933979 is a wasteful number, since it uses less digits than its factorization.

87933979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105594 (or 105587 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 55.

The square root of 87933979 is about 9377.3119282660. The cubic root of 87933979 is about 444.6847558988.

Subtracting 87933979 from its reverse (97933978), we obtain a palindrome (9999999).

The spelling of 87933979 in words is "eighty-seven million, nine hundred thirty-three thousand, nine hundred seventy-nine".