55964591 has 2 divisors, whose sum is σ = 55964592. Its totient is φ = 55964590.

The previous prime is 55964581. The next prime is 55964599. The reversal of 55964591 is 19546955.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55964591 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55964599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27982295 + 27982296.

It is an arithmetic number, because the mean of its divisors is an integer number (27982296).

Almost surely, 2^55964591 is an apocalyptic number.

55964591 is a deficient number, since it is larger than the sum of its proper divisors (1).

55964591 is an equidigital number, since it uses as much as digits as its factorization.

55964591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 44.

The square root of 55964591 is about 7480.9485361149. The cubic root of 55964591 is about 382.5055826716.

The spelling of 55964591 in words is "fifty-five million, nine hundred sixty-four thousand, five hundred ninety-one".