54991923 has 32 divisors (see below), whose sum is σ = 91607040. Its totient is φ = 28615680.

The previous prime is 54991903. The next prime is 54991933. The reversal of 54991923 is 32919945.

54991923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 54991923 - 2⁵ = 54991891 is a prime.

It is a super-2 number, since 2×54991923² = 6048223190475858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54991903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8583 + ... + 13551.

It is an arithmetic number, because the mean of its divisors is an integer number (2862720).

Almost surely, 2^54991923 is an apocalyptic number.

54991923 is a deficient number, since it is larger than the sum of its proper divisors (36615117).

54991923 is a wasteful number, since it uses less digits than its factorization.

54991923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027.

The product of its digits is 87480, while the sum is 42.

The square root of 54991923 is about 7415.6539158728. The cubic root of 54991923 is about 380.2766291363.

The spelling of 54991923 in words is "fifty-four million, nine hundred ninety-one thousand, nine hundred twenty-three".