56609369 has 2 divisors, whose sum is σ = 56609370. Its totient is φ = 56609368.

The previous prime is 56609321. The next prime is 56609381. The reversal of 56609369 is 96390665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 16096144 = 6365^2 + 4012^2 .

It is a cyclic number.

It is not a de Polignac number, because 56609369 - 2¹² = 56605273 is a prime.

It is a super-2 number, since 2×56609369² = 6409241317156322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56609669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28304684 + 28304685.

It is an arithmetic number, because the mean of its divisors is an integer number (28304685).

Almost surely, 2^56609369 is an apocalyptic number.

It is an amenable number.

56609369 is a deficient number, since it is larger than the sum of its proper divisors (1).

56609369 is an equidigital number, since it uses as much as digits as its factorization.

56609369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 56609369 is about 7523.9197895778. The cubic root of 56609369 is about 383.9689486791.

The spelling of 56609369 in words is "fifty-six million, six hundred nine thousand, three hundred sixty-nine".