55638589 has 2 divisors, whose sum is σ = 55638590. Its totient is φ = 55638588.

The previous prime is 55638563. The next prime is 55638607. The reversal of 55638589 is 98583655.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 1542564 = 7355^2 + 1242^2 .

It is a cyclic number.

It is not a de Polignac number, because 55638589 - 2⁷ = 55638461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55638509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27819294 + 27819295.

It is an arithmetic number, because the mean of its divisors is an integer number (27819295).

Almost surely, 2^55638589 is an apocalyptic number.

It is an amenable number.

55638589 is a deficient number, since it is larger than the sum of its proper divisors (1).

55638589 is an equidigital number, since it uses as much as digits as its factorization.

55638589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 49.

The square root of 55638589 is about 7459.1278980857. The cubic root of 55638589 is about 381.7614186884.

The spelling of 55638589 in words is "fifty-five million, six hundred thirty-eight thousand, five hundred eighty-nine".