55929557 has 4 divisors (see below), whose sum is σ = 55973280. Its totient is φ = 55885836.

The previous prime is 55929539. The next prime is 55929563. The reversal of 55929557 is 75592955.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75592955 = 5 ⋅15118591.

It is a cyclic number.

It is not a de Polignac number, because 55929557 - 2⁶ = 55929493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55929527) 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, 19883 + ... + 22520.

It is an arithmetic number, because the mean of its divisors is an integer number (13993320).

Almost surely, 2^55929557 is an apocalyptic number.

It is an amenable number.

55929557 is a deficient number, since it is larger than the sum of its proper divisors (43723).

55929557 is a wasteful number, since it uses less digits than its factorization.

55929557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43722.

The product of its digits is 708750, while the sum is 47.

The square root of 55929557 is about 7478.6066215573. The cubic root of 55929557 is about 382.4257494675.

The spelling of 55929557 in words is "fifty-five million, nine hundred twenty-nine thousand, five hundred fifty-seven".