55918679 has 2 divisors, whose sum is σ = 55918680. Its totient is φ = 55918678.

The previous prime is 55918663. The next prime is 55918693. The reversal of 55918679 is 97681955.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55918679 - 2⁴ = 55918663 is a prime.

It is a super-2 number, since 2×55918679² = 6253797322210082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55918609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27959339 + 27959340.

It is an arithmetic number, because the mean of its divisors is an integer number (27959340).

Almost surely, 2^55918679 is an apocalyptic number.

55918679 is a deficient number, since it is larger than the sum of its proper divisors (1).

55918679 is an equidigital number, since it uses as much as digits as its factorization.

55918679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 50.

The square root of 55918679 is about 7477.8793116765. The cubic root of 55918679 is about 382.4009546049.

The spelling of 55918679 in words is "fifty-five million, nine hundred eighteen thousand, six hundred seventy-nine".