55777923 has 32 divisors (see below), whose sum is σ = 85536000. Its totient is φ = 35900928.

The previous prime is 55777903. The next prime is 55777937. The reversal of 55777923 is 32977755.

It is a happy number.

55777923 is a `hidden beast` number, since 5 + 577 + 79 + 2 + 3 = 666.

It is not a de Polignac number, because 55777923 - 2⁶ = 55777859 is a prime.

It is a super-2 number, since 2×55777923² = 6222353388387858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55777903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124003 + ... + 124451.

It is an arithmetic number, because the mean of its divisors is an integer number (2673000).

Almost surely, 2^55777923 is an apocalyptic number.

55777923 is a deficient number, since it is larger than the sum of its proper divisors (29758077).

55777923 is a wasteful number, since it uses less digits than its factorization.

55777923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 602 counting only the distinct ones).

The product of its digits is 463050, while the sum is 45.

The square root of 55777923 is about 7468.4618898405. The cubic root of 55777923 is about 382.0798308162.

The spelling of 55777923 in words is "fifty-five million, seven hundred seventy-seven thousand, nine hundred twenty-three".