56717399 has 2 divisors, whose sum is σ = 56717400. Its totient is φ = 56717398.

The previous prime is 56717393. The next prime is 56717407. The reversal of 56717399 is 99371765.

It is a happy number.

56717399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56717399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56717393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28358699 + 28358700.

It is an arithmetic number, because the mean of its divisors is an integer number (28358700).

Almost surely, 2^56717399 is an apocalyptic number.

56717399 is a deficient number, since it is larger than the sum of its proper divisors (1).

56717399 is an equidigital number, since it uses as much as digits as its factorization.

56717399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 47.

The square root of 56717399 is about 7531.0954714437. The cubic root of 56717399 is about 384.2130414156.

The spelling of 56717399 in words is "fifty-six million, seven hundred seventeen thousand, three hundred ninety-nine".