55238979 has 4 divisors (see below), whose sum is σ = 73651976. Its totient is φ = 36825984.

The previous prime is 55238917. The next prime is 55238983. The reversal of 55238979 is 97983255.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55238979 - 2⁷ = 55238851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55238279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9206494 + ... + 9206499.

It is an arithmetic number, because the mean of its divisors is an integer number (18412994).

Almost surely, 2^55238979 is an apocalyptic number.

55238979 is a deficient number, since it is larger than the sum of its proper divisors (18412997).

55238979 is a wasteful number, since it uses less digits than its factorization.

55238979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18412996.

The product of its digits is 680400, while the sum is 48.

The square root of 55238979 is about 7432.2929839989. The cubic root of 55238979 is about 380.8452537366.

The spelling of 55238979 in words is "fifty-five million, two hundred thirty-eight thousand, nine hundred seventy-nine".