55737613 has 2 divisors, whose sum is σ = 55737614. Its totient is φ = 55737612.

The previous prime is 55737587. The next prime is 55737653. The reversal of 55737613 is 31673755.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55681444 + 56169 = 7462^2 + 237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55737613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55737653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27868806 + 27868807.

It is an arithmetic number, because the mean of its divisors is an integer number (27868807).

Almost surely, 2^55737613 is an apocalyptic number.

It is an amenable number.

55737613 is a deficient number, since it is larger than the sum of its proper divisors (1).

55737613 is an equidigital number, since it uses as much as digits as its factorization.

55737613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 37.

The square root of 55737613 is about 7465.7627205799. The cubic root of 55737613 is about 381.9877672133.

The spelling of 55737613 in words is "fifty-five million, seven hundred thirty-seven thousand, six hundred thirteen".