55980863 has 2 divisors, whose sum is σ = 55980864. Its totient is φ = 55980862.

The previous prime is 55980857. The next prime is 55980913. The reversal of 55980863 is 36808955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55980863 - 2⁸ = 55980607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55980833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27990431 + 27990432.

It is an arithmetic number, because the mean of its divisors is an integer number (27990432).

Almost surely, 2^55980863 is an apocalyptic number.

55980863 is a deficient number, since it is larger than the sum of its proper divisors (1).

55980863 is an equidigital number, since it uses as much as digits as its factorization.

55980863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 55980863 is about 7482.0360196941. The cubic root of 55980863 is about 382.5426509177.

The spelling of 55980863 in words is "fifty-five million, nine hundred eighty thousand, eight hundred sixty-three".