55977169 has 4 divisors (see below), whose sum is σ = 57033396. Its totient is φ = 54920944.

The previous prime is 55977161. The next prime is 55977197. The reversal of 55977169 is 96177955.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96177955 = 5 ⋅19235591.

It can be written as a sum of positive squares in 2 ways, for example, as 50594769 + 5382400 = 7113^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 55977169 - 2³ = 55977161 is a prime.

It is a super-2 number, since 2×55977169² = 6266886898509122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55977161) 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, 528034 + ... + 528139.

It is an arithmetic number, because the mean of its divisors is an integer number (14258349).

Almost surely, 2^55977169 is an apocalyptic number.

It is an amenable number.

55977169 is a deficient number, since it is larger than the sum of its proper divisors (1056227).

55977169 is a wasteful number, since it uses less digits than its factorization.

55977169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056226.

The product of its digits is 595350, while the sum is 49.

The square root of 55977169 is about 7481.7891576815. The cubic root of 55977169 is about 382.5342364730.

The spelling of 55977169 in words is "fifty-five million, nine hundred seventy-seven thousand, one hundred sixty-nine".