55977539 has 2 divisors, whose sum is σ = 55977540. Its totient is φ = 55977538.

The previous prime is 55977521. The next prime is 55977541. The reversal of 55977539 is 93577955.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55977539 - 2¹² = 55973443 is a prime.

It is a Sophie Germain prime.

Together with 55977541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55977139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27988769 + 27988770.

It is an arithmetic number, because the mean of its divisors is an integer number (27988770).

Almost surely, 2^55977539 is an apocalyptic number.

55977539 is a deficient number, since it is larger than the sum of its proper divisors (1).

55977539 is an equidigital number, since it uses as much as digits as its factorization.

55977539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1488375, while the sum is 50.

The square root of 55977539 is about 7481.8138843465. The cubic root of 55977539 is about 382.5350793009.

The spelling of 55977539 in words is "fifty-five million, nine hundred seventy-seven thousand, five hundred thirty-nine".