56809939 has 2 divisors, whose sum is σ = 56809940. Its totient is φ = 56809938.

The previous prime is 56809933. The next prime is 56809997. The reversal of 56809939 is 93990865.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56809939 - 2¹³ = 56801747 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56809892 and 56809901.

It is not a weakly prime, because it can be changed into another prime (56809933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28404969 + 28404970.

It is an arithmetic number, because the mean of its divisors is an integer number (28404970).

Almost surely, 2^56809939 is an apocalyptic number.

56809939 is a deficient number, since it is larger than the sum of its proper divisors (1).

56809939 is an equidigital number, since it uses as much as digits as its factorization.

56809939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 56809939 is about 7537.2368279098. The cubic root of 56809939 is about 384.4218882938.

The spelling of 56809939 in words is "fifty-six million, eight hundred nine thousand, nine hundred thirty-nine".