55917923 has 2 divisors, whose sum is σ = 55917924. Its totient is φ = 55917922.

The previous prime is 55917889. The next prime is 55917929. The reversal of 55917923 is 32971955.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55917923 - 2¹⁴ = 55901539 is a prime.

It is a super-2 number, since 2×55917923² = 6253628225267858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55917929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27958961 + 27958962.

It is an arithmetic number, because the mean of its divisors is an integer number (27958962).

Almost surely, 2^55917923 is an apocalyptic number.

55917923 is a deficient number, since it is larger than the sum of its proper divisors (1).

55917923 is an equidigital number, since it uses as much as digits as its factorization.

55917923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 41.

The square root of 55917923 is about 7477.8287624149. The cubic root of 55917923 is about 382.3992312904.

The spelling of 55917923 in words is "fifty-five million, nine hundred seventeen thousand, nine hundred twenty-three".