55820923 has 4 divisors (see below), whose sum is σ = 57119128. Its totient is φ = 54522720.

The previous prime is 55820909. The next prime is 55820927. The reversal of 55820923 is 32902855.

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 55820923 - 2²¹ = 53723771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55820927) 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, 649038 + ... + 649123.

It is an arithmetic number, because the mean of its divisors is an integer number (14279782).

Almost surely, 2^55820923 is an apocalyptic number.

55820923 is a deficient number, since it is larger than the sum of its proper divisors (1298205).

55820923 is a wasteful number, since it uses less digits than its factorization.

55820923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298204.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 55820923 is about 7471.3401073703. The cubic root of 55820923 is about 382.1779892019.

The spelling of 55820923 in words is "fifty-five million, eight hundred twenty thousand, nine hundred twenty-three".