54591979 has 4 divisors (see below), whose sum is σ = 58791376. Its totient is φ = 50392584.

The previous prime is 54591973. The next prime is 54592001. The reversal of 54591979 is 97919545.

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

It is a cyclic number.

It is not a de Polignac number, because 54591979 - 2⁷ = 54591851 is a prime.

It is a super-2 number, since 2×54591979² = 5960568342272882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54591973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099679 + ... + 2099704.

It is an arithmetic number, because the mean of its divisors is an integer number (14697844).

Almost surely, 2^54591979 is an apocalyptic number.

54591979 is a deficient number, since it is larger than the sum of its proper divisors (4199397).

54591979 is a wasteful number, since it uses less digits than its factorization.

54591979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4199396.

The product of its digits is 510300, while the sum is 49.

The square root of 54591979 is about 7388.6385078714. The cubic root of 54591979 is about 379.3524961071.

The spelling of 54591979 in words is "fifty-four million, five hundred ninety-one thousand, nine hundred seventy-nine".