55718693 has 2 divisors, whose sum is σ = 55718694. Its totient is φ = 55718692.

The previous prime is 55718683. The next prime is 55718701. The reversal of 55718693 is 39681755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55681444 + 37249 = 7462^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 55718693 - 2²⁰ = 54670117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55718603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27859346 + 27859347.

It is an arithmetic number, because the mean of its divisors is an integer number (27859347).

Almost surely, 2^55718693 is an apocalyptic number.

It is an amenable number.

55718693 is a deficient number, since it is larger than the sum of its proper divisors (1).

55718693 is an equidigital number, since it uses as much as digits as its factorization.

55718693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 55718693 is about 7464.4954953433. The cubic root of 55718693 is about 381.9445407093.

The spelling of 55718693 in words is "fifty-five million, seven hundred eighteen thousand, six hundred ninety-three".