56775613 has 2 divisors, whose sum is σ = 56775614. Its totient is φ = 56775612.

The previous prime is 56775581. The next prime is 56775637. The reversal of 56775613 is 31657765.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29181604 + 27594009 = 5402^2 + 5253^2 .

It is a cyclic number.

It is not a de Polignac number, because 56775613 - 2⁵ = 56775581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56775643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28387806 + 28387807.

It is an arithmetic number, because the mean of its divisors is an integer number (28387807).

Almost surely, 2^56775613 is an apocalyptic number.

It is an amenable number.

56775613 is a deficient number, since it is larger than the sum of its proper divisors (1).

56775613 is an equidigital number, since it uses as much as digits as its factorization.

56775613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132300, while the sum is 40.

The square root of 56775613 is about 7534.9593894062. The cubic root of 56775613 is about 384.3444468896.

The spelling of 56775613 in words is "fifty-six million, seven hundred seventy-five thousand, six hundred thirteen".