56009389 has 2 divisors, whose sum is σ = 56009390. Its totient is φ = 56009388.

The previous prime is 56009329. The next prime is 56009399. The reversal of 56009389 is 98390065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 3736489 = 7230^2 + 1933^2 .

It is a cyclic number.

It is not a de Polignac number, because 56009389 - 2¹⁵ = 55976621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56009309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28004694 + 28004695.

It is an arithmetic number, because the mean of its divisors is an integer number (28004695).

Almost surely, 2^56009389 is an apocalyptic number.

It is an amenable number.

56009389 is a deficient number, since it is larger than the sum of its proper divisors (1).

56009389 is an equidigital number, since it uses as much as digits as its factorization.

56009389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 56009389 is about 7483.9420762056. The cubic root of 56009389 is about 382.6076169202.

The spelling of 56009389 in words is "fifty-six million, nine thousand, three hundred eighty-nine".