55653977 has 4 divisors (see below), whose sum is σ = 55668900. Its totient is φ = 55639056.

The previous prime is 55653973. The next prime is 55653991. The reversal of 55653977 is 77935655.

55653977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 50183056 + 5470921 = 7084^2 + 2339^2 .

It is a cyclic number.

It is not a de Polignac number, because 55653977 - 2² = 55653973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55653973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3563 + ... + 11135.

It is an arithmetic number, because the mean of its divisors is an integer number (13917225).

Almost surely, 2^55653977 is an apocalyptic number.

It is an amenable number.

55653977 is a deficient number, since it is larger than the sum of its proper divisors (14923).

55653977 is an equidigital number, since it uses as much as digits as its factorization.

55653977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14922.

The product of its digits is 992250, while the sum is 47.

The square root of 55653977 is about 7460.1593146527. The cubic root of 55653977 is about 381.7966101106.

The spelling of 55653977 in words is "fifty-five million, six hundred fifty-three thousand, nine hundred seventy-seven".