55980913 has 2 divisors, whose sum is σ = 55980914. Its totient is φ = 55980912.

The previous prime is 55980863. The next prime is 55980917. The reversal of 55980913 is 31908955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47983329 + 7997584 = 6927^2 + 2828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55980913 is a prime.

It is not a weakly prime, because it can be changed into another prime (55980917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27990456 + 27990457.

It is an arithmetic number, because the mean of its divisors is an integer number (27990457).

Almost surely, 2^55980913 is an apocalyptic number.

It is an amenable number.

55980913 is a deficient number, since it is larger than the sum of its proper divisors (1).

55980913 is an equidigital number, since it uses as much as digits as its factorization.

55980913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 55980913 is about 7482.0393610299. The cubic root of 55980913 is about 382.5427648086.

The spelling of 55980913 in words is "fifty-five million, nine hundred eighty thousand, nine hundred thirteen".