55679717 has 2 divisors, whose sum is σ = 55679718. Its totient is φ = 55679716.

The previous prime is 55679713. The next prime is 55679719. The reversal of 55679717 is 71797655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29964676 + 25715041 = 5474^2 + 5071^2 .

It is a cyclic number.

It is not a de Polignac number, because 55679717 - 2² = 55679713 is a prime.

Together with 55679719, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55679713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27839858 + 27839859.

It is an arithmetic number, because the mean of its divisors is an integer number (27839859).

Almost surely, 2^55679717 is an apocalyptic number.

It is an amenable number.

55679717 is a deficient number, since it is larger than the sum of its proper divisors (1).

55679717 is an equidigital number, since it uses as much as digits as its factorization.

55679717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 463050, while the sum is 47.

The square root of 55679717 is about 7461.8842794565. The cubic root of 55679717 is about 381.8554614308.

The spelling of 55679717 in words is "fifty-five million, six hundred seventy-nine thousand, seven hundred seventeen".