55659959 has 4 divisors (see below), whose sum is σ = 56028720. Its totient is φ = 55291200.

The previous prime is 55659943. The next prime is 55659971. The reversal of 55659959 is 95995655.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55659959 - 2⁴ = 55659943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55659959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55659979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184154 + ... + 184455.

It is an arithmetic number, because the mean of its divisors is an integer number (14007180).

Almost surely, 2^55659959 is an apocalyptic number.

55659959 is a deficient number, since it is larger than the sum of its proper divisors (368761).

55659959 is a wasteful number, since it uses less digits than its factorization.

55659959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368760.

The product of its digits is 2733750, while the sum is 53.

The square root of 55659959 is about 7460.5602336554. The cubic root of 55659959 is about 381.8102888305.

The spelling of 55659959 in words is "fifty-five million, six hundred fifty-nine thousand, nine hundred fifty-nine".