56809369 has 6 divisors (see below), whose sum is σ = 57387710. Its totient is φ = 56236800.

The previous prime is 56809339. The next prime is 56809381. The reversal of 56809369 is 96390865.

It can be written as a sum of positive squares in 3 ways, for example, as 29560969 + 27248400 = 5437^2 + 5220^2 .

It is not a de Polignac number, because 56809369 - 2¹⁹ = 56285081 is a prime.

It is a super-2 number, since 2×56809369² = 6454608812356322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56809309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7417 + ... + 12985.

Almost surely, 2^56809369 is an apocalyptic number.

It is an amenable number.

56809369 is a deficient number, since it is larger than the sum of its proper divisors (578341).

56809369 is an equidigital number, since it uses as much as digits as its factorization.

56809369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771 (or 5670 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 56809369 is about 7537.1990155495. The cubic root of 56809369 is about 384.4206025962.

The spelling of 56809369 in words is "fifty-six million, eight hundred nine thousand, three hundred sixty-nine".