56009997 has 6 divisors (see below), whose sum is σ = 80903342. Its totient is φ = 37339992.

The previous prime is 56009959. The next prime is 56010011. The reversal of 56009997 is 79990065.

56009997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 51108201 + 4901796 = 7149^2 + 2214^2 .

It is not a de Polignac number, because 56009997 - 2⁷ = 56009869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56009927) 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 in 5 ways as a sum of consecutive naturals, for example, 3111658 + ... + 3111675.

Almost surely, 2^56009997 is an apocalyptic number.

It is an amenable number.

56009997 is a deficient number, since it is larger than the sum of its proper divisors (24893345).

56009997 is a wasteful number, since it uses less digits than its factorization.

56009997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6223339 (or 6223336 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 56009997 is about 7483.9826963990. The cubic root of 56009997 is about 382.6090013583.

The spelling of 56009997 in words is "fifty-six million, nine thousand, nine hundred ninety-seven".