56903009 has 2 divisors, whose sum is σ = 56903010. Its totient is φ = 56903008.

The previous prime is 56902981. The next prime is 56903051. The reversal of 56903009 is 90030965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36336784 + 20566225 = 6028^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 56903009 - 2⁸ = 56902753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56903059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28451504 + 28451505.

It is an arithmetic number, because the mean of its divisors is an integer number (28451505).

Almost surely, 2^56903009 is an apocalyptic number.

It is an amenable number.

56903009 is a deficient number, since it is larger than the sum of its proper divisors (1).

56903009 is an equidigital number, since it uses as much as digits as its factorization.

56903009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 56903009 is about 7543.4083145485. The cubic root of 56903009 is about 384.6317026646.

The spelling of 56903009 in words is "fifty-six million, nine hundred three thousand, nine".