56801009 has 2 divisors, whose sum is σ = 56801010. Its totient is φ = 56801008.

The previous prime is 56800993. The next prime is 56801023. The reversal of 56801009 is 90010865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55830784 + 970225 = 7472^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 56801009 - 2⁴ = 56800993 is a prime.

It is not a weakly prime, because it can be changed into another prime (56801909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28400504 + 28400505.

It is an arithmetic number, because the mean of its divisors is an integer number (28400505).

Almost surely, 2^56801009 is an apocalyptic number.

It is an amenable number.

56801009 is a deficient number, since it is larger than the sum of its proper divisors (1).

56801009 is an equidigital number, since it uses as much as digits as its factorization.

56801009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 56801009 is about 7536.6444124690. The cubic root of 56801009 is about 384.4017447097.

The spelling of 56801009 in words is "fifty-six million, eight hundred one thousand, nine".