56438609 has 2 divisors, whose sum is σ = 56438610. Its totient is φ = 56438608.

The previous prime is 56438597. The next prime is 56438617. The reversal of 56438609 is 90683465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53699584 + 2739025 = 7328^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 56438609 - 2⁸ = 56438353 is a prime.

It is not a weakly prime, because it can be changed into another prime (56438689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28219304 + 28219305.

It is an arithmetic number, because the mean of its divisors is an integer number (28219305).

Almost surely, 2^56438609 is an apocalyptic number.

It is an amenable number.

56438609 is a deficient number, since it is larger than the sum of its proper divisors (1).

56438609 is an equidigital number, since it uses as much as digits as its factorization.

56438609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 56438609 is about 7512.5634107141. The cubic root of 56438609 is about 383.5824839422.

The spelling of 56438609 in words is "fifty-six million, four hundred thirty-eight thousand, six hundred nine".