55857923 has 4 divisors (see below), whose sum is σ = 60935928. Its totient is φ = 50779920.

The previous prime is 55857917. The next prime is 55857943. The reversal of 55857923 is 32975855.

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 55857923 - 2²⁰ = 54809347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55857943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538986 + ... + 2539007.

It is an arithmetic number, because the mean of its divisors is an integer number (15233982).

Almost surely, 2^55857923 is an apocalyptic number.

55857923 is a deficient number, since it is larger than the sum of its proper divisors (5078005).

55857923 is a wasteful number, since it uses less digits than its factorization.

55857923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078004.

The product of its digits is 378000, while the sum is 44.

The square root of 55857923 is about 7473.8158259352. The cubic root of 55857923 is about 382.2624107277.

The spelling of 55857923 in words is "fifty-five million, eight hundred fifty-seven thousand, nine hundred twenty-three".