56863209 has 8 divisors (see below), whose sum is σ = 81649792. Its totient is φ = 34992720.

The previous prime is 56863159. The next prime is 56863211. The reversal of 56863209 is 90236865.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56863209 - 2²⁵ = 23308777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1458031 = 56863209 / (5 + 6 + 8 + 6 + 3 + 2 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56863259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728977 + ... + 729054.

It is an arithmetic number, because the mean of its divisors is an integer number (10206224).

Almost surely, 2^56863209 is an apocalyptic number.

It is an amenable number.

56863209 is a deficient number, since it is larger than the sum of its proper divisors (24786583).

56863209 is a wasteful number, since it uses less digits than its factorization.

56863209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458047.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 56863209 is about 7540.7697882908. The cubic root of 56863209 is about 384.5420066919.

The spelling of 56863209 in words is "fifty-six million, eight hundred sixty-three thousand, two hundred nine".