55977563 has 2 divisors, whose sum is σ = 55977564. Its totient is φ = 55977562.

The previous prime is 55977557. The next prime is 55977613. The reversal of 55977563 is 36577955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55977563 - 2⁴ = 55977547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55977463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27988781 + 27988782.

It is an arithmetic number, because the mean of its divisors is an integer number (27988782).

Almost surely, 2^55977563 is an apocalyptic number.

55977563 is a deficient number, since it is larger than the sum of its proper divisors (1).

55977563 is an equidigital number, since it uses as much as digits as its factorization.

55977563 is an evil number, because the sum of its binary digits is even.

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

The square root of 55977563 is about 7481.8154882355. The cubic root of 55977563 is about 382.5351339707.

The spelling of 55977563 in words is "fifty-five million, nine hundred seventy-seven thousand, five hundred sixty-three".