54979839 has 12 divisors (see below), whose sum is σ = 80308800. Its totient is φ = 36240864.

The previous prime is 54979831. The next prime is 54979879. The reversal of 54979839 is 93897945.

54979839 is a `hidden beast` number, since 549 + 7 + 98 + 3 + 9 = 666.

It is not a de Polignac number, because 54979839 - 2³ = 54979831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54979831) 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, 33519 + ... + 35120.

It is an arithmetic number, because the mean of its divisors is an integer number (6692400).

Almost surely, 2^54979839 is an apocalyptic number.

54979839 is a deficient number, since it is larger than the sum of its proper divisors (25328961).

54979839 is a wasteful number, since it uses less digits than its factorization.

54979839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68734 (or 68731 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 54979839 is about 7414.8391081668. The cubic root of 54979839 is about 380.2487729278.

The spelling of 54979839 in words is "fifty-four million, nine hundred seventy-nine thousand, eight hundred thirty-nine".