54939979 has 2 divisors, whose sum is σ = 54939980. Its totient is φ = 54939978.

The previous prime is 54939961. The next prime is 54940003. The reversal of 54939979 is 97993945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54939979 - 2⁵ = 54939947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54939779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27469989 + 27469990.

It is an arithmetic number, because the mean of its divisors is an integer number (27469990).

Almost surely, 2^54939979 is an apocalyptic number.

54939979 is a deficient number, since it is larger than the sum of its proper divisors (1).

54939979 is an equidigital number, since it uses as much as digits as its factorization.

54939979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2755620, while the sum is 55.

The square root of 54939979 is about 7412.1507674898. The cubic root of 54939979 is about 380.1568581418.

The spelling of 54939979 in words is "fifty-four million, nine hundred thirty-nine thousand, nine hundred seventy-nine".