56619389 has 4 divisors (see below), whose sum is σ = 56830140. Its totient is φ = 56408640.

The previous prime is 56619377. The next prime is 56619391. The reversal of 56619389 is 98391665.

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 7198489 + 49420900 = 2683^2 + 7030^2 .

It is a cyclic number.

It is not a de Polignac number, because 56619389 - 2²⁰ = 55570813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56619359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104972 + ... + 105509.

It is an arithmetic number, because the mean of its divisors is an integer number (14207535).

Almost surely, 2^56619389 is an apocalyptic number.

It is an amenable number.

56619389 is a deficient number, since it is larger than the sum of its proper divisors (210751).

56619389 is a wasteful number, since it uses less digits than its factorization.

56619389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210750.

The product of its digits is 349920, while the sum is 47.

The square root of 56619389 is about 7524.5856364321. The cubic root of 56619389 is about 383.9916018309.

The spelling of 56619389 in words is "fifty-six million, six hundred nineteen thousand, three hundred eighty-nine".