55979979 has 8 divisors (see below), whose sum is σ = 81425472. Its totient is φ = 33927240.

The previous prime is 55979971. The next prime is 55979993. The reversal of 55979979 is 97997955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55979979 - 2³ = 55979971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55979971) 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, 848149 + ... + 848214.

It is an arithmetic number, because the mean of its divisors is an integer number (10178184).

Almost surely, 2^55979979 is an apocalyptic number.

55979979 is a deficient number, since it is larger than the sum of its proper divisors (25445493).

55979979 is a wasteful number, since it uses less digits than its factorization.

55979979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696377.

The product of its digits is 8037225, while the sum is 60.

The square root of 55979979 is about 7481.9769446317. The cubic root of 55979979 is about 382.5406373160.

It can be divided in two parts, 5597 and 9979, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 55979979 in words is "fifty-five million, nine hundred seventy-nine thousand, nine hundred seventy-nine".