54657139 has 2 divisors, whose sum is σ = 54657140. Its totient is φ = 54657138.

The previous prime is 54657137. The next prime is 54657143. The reversal of 54657139 is 93175645.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54657139 - 2¹ = 54657137 is a prime.

Together with 54657137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (54657137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27328569 + 27328570.

It is an arithmetic number, because the mean of its divisors is an integer number (27328570).

Almost surely, 2^54657139 is an apocalyptic number.

54657139 is a deficient number, since it is larger than the sum of its proper divisors (1).

54657139 is an equidigital number, since it uses as much as digits as its factorization.

54657139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 54657139 is about 7393.0466656176. The cubic root of 54657139 is about 379.5033655270.

The spelling of 54657139 in words is "fifty-four million, six hundred fifty-seven thousand, one hundred thirty-nine".