56773621 has 2 divisors, whose sum is σ = 56773622. Its totient is φ = 56773620.

The previous prime is 56773601. The next prime is 56773649. The reversal of 56773621 is 12637765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 13608721 = 6570^2 + 3689^2 .

It is a cyclic number.

It is not a de Polignac number, because 56773621 - 2⁹ = 56773109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56773601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28386810 + 28386811.

It is an arithmetic number, because the mean of its divisors is an integer number (28386811).

Almost surely, 2^56773621 is an apocalyptic number.

It is an amenable number.

56773621 is a deficient number, since it is larger than the sum of its proper divisors (1).

56773621 is an equidigital number, since it uses as much as digits as its factorization.

56773621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 37.

The square root of 56773621 is about 7534.8272043890. The cubic root of 56773621 is about 384.3399518664.

The spelling of 56773621 in words is "fifty-six million, seven hundred seventy-three thousand, six hundred twenty-one".