56119809 has 4 divisors (see below), whose sum is σ = 74826416. Its totient is φ = 37413204.

The previous prime is 56119799. The next prime is 56119813. The reversal of 56119809 is 90891165.

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.

It is not a de Polignac number, because 56119809 - 2¹⁹ = 55595521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56119879) 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, 9353299 + ... + 9353304.

It is an arithmetic number, because the mean of its divisors is an integer number (18706604).

Almost surely, 2^56119809 is an apocalyptic number.

It is an amenable number.

56119809 is a deficient number, since it is larger than the sum of its proper divisors (18706607).

56119809 is a wasteful number, since it uses less digits than its factorization.

56119809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18706606.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 56119809 is about 7491.3155720474. The cubic root of 56119809 is about 382.8588831284.

The spelling of 56119809 in words is "fifty-six million, one hundred nineteen thousand, eight hundred nine".