56720929 has 2 divisors, whose sum is σ = 56720930. Its totient is φ = 56720928.

The previous prime is 56720899. The next prime is 56720933. The reversal of 56720929 is 92902765.

It is a happy number.

56720929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49322529 + 7398400 = 7023^2 + 2720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56720929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56720891 and 56720900.

It is not a weakly prime, because it can be changed into another prime (56720969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28360464 + 28360465.

It is an arithmetic number, because the mean of its divisors is an integer number (28360465).

Almost surely, 2^56720929 is an apocalyptic number.

It is an amenable number.

56720929 is a deficient number, since it is larger than the sum of its proper divisors (1).

56720929 is an equidigital number, since it uses as much as digits as its factorization.

56720929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 56720929 is about 7531.3298294524. The cubic root of 56720929 is about 384.2210121848.

The spelling of 56720929 in words is "fifty-six million, seven hundred twenty thousand, nine hundred twenty-nine".