55789717 has 2 divisors, whose sum is σ = 55789718. Its totient is φ = 55789716.

The previous prime is 55789711. The next prime is 55789777. The reversal of 55789717 is 71798755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51753636 + 4036081 = 7194^2 + 2009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55789717 is a prime.

It is a super-2 number, since 2×55789717² = 6224985045880178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55789711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27894858 + 27894859.

It is an arithmetic number, because the mean of its divisors is an integer number (27894859).

Almost surely, 2^55789717 is an apocalyptic number.

It is an amenable number.

55789717 is a deficient number, since it is larger than the sum of its proper divisors (1).

55789717 is an equidigital number, since it uses as much as digits as its factorization.

55789717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 617400, while the sum is 49.

The square root of 55789717 is about 7469.2514350502. The cubic root of 55789717 is about 382.1067586263.

The spelling of 55789717 in words is "fifty-five million, seven hundred eighty-nine thousand, seven hundred seventeen".