55397599 has 2 divisors, whose sum is σ = 55397600. Its totient is φ = 55397598.

The previous prime is 55397581. The next prime is 55397609. The reversal of 55397599 is 99579355.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55397599 - 2⁷ = 55397471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55397539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27698799 + 27698800.

It is an arithmetic number, because the mean of its divisors is an integer number (27698800).

Almost surely, 2^55397599 is an apocalyptic number.

55397599 is a deficient number, since it is larger than the sum of its proper divisors (1).

55397599 is an equidigital number, since it uses as much as digits as its factorization.

55397599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1913625, while the sum is 52.

The square root of 55397599 is about 7442.9563346831. The cubic root of 55397599 is about 381.2094406732.

The spelling of 55397599 in words is "fifty-five million, three hundred ninety-seven thousand, five hundred ninety-nine".