56900009 has 4 divisors (see below), whose sum is σ = 56927316. Its totient is φ = 56872704.

The previous prime is 56899993. The next prime is 56900021. The reversal of 56900009 is 90000965.

56900009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27793984 + 29106025 = 5272^2 + 5395^2 .

It is a cyclic number.

It is not a de Polignac number, because 56900009 - 2⁴ = 56899993 is a prime.

It is a super-2 number, since 2×56900009² = 6475222048400162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56900029) 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 3 ways as a sum of consecutive naturals, for example, 10244 + ... + 14789.

It is an arithmetic number, because the mean of its divisors is an integer number (14231829).

Almost surely, 2^56900009 is an apocalyptic number.

It is an amenable number.

56900009 is a deficient number, since it is larger than the sum of its proper divisors (27307).

56900009 is a wasteful number, since it uses less digits than its factorization.

56900009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27306.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 56900009 is about 7543.2094628215. The cubic root of 56900009 is about 384.6249431194.

The spelling of 56900009 in words is "fifty-six million, nine hundred thousand, nine".