56858909 has 4 divisors (see below), whose sum is σ = 56875104. Its totient is φ = 56842716.

The previous prime is 56858903. The next prime is 56858911. The reversal of 56858909 is 90985865.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90985865 = 5 ⋅18197173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56858909 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 (56858903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377 + ... + 10670.

It is an arithmetic number, because the mean of its divisors is an integer number (14218776).

Almost surely, 2^56858909 is an apocalyptic number.

It is an amenable number.

56858909 is a deficient number, since it is larger than the sum of its proper divisors (16195).

56858909 is a wasteful number, since it uses less digits than its factorization.

56858909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16194.

The product of its (nonzero) digits is 777600, while the sum is 50.

The square root of 56858909 is about 7540.4846661206. The cubic root of 56858909 is about 384.5323134161.

The spelling of 56858909 in words is "fifty-six million, eight hundred fifty-eight thousand, nine hundred nine".