1564397713 has 2 divisors, whose sum is σ = 1564397714. Its totient is φ = 1564397712.

The previous prime is 1564397711. The next prime is 1564397753. The reversal of 1564397713 is 3177934651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1245525264 + 318872449 = 35292^2 + 17857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1564397713 - 2¹ = 1564397711 is a prime.

Together with 1564397711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1564397711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782198856 + 782198857.

It is an arithmetic number, because the mean of its divisors is an integer number (782198857).

Almost surely, 2^1564397713 is an apocalyptic number.

It is an amenable number.

1564397713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564397713 is an equidigital number, since it uses as much as digits as its factorization.

1564397713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 46.

The square root of 1564397713 is about 39552.4678496804. The cubic root of 1564397713 is about 1160.8667998609.

The spelling of 1564397713 in words is "one billion, five hundred sixty-four million, three hundred ninety-seven thousand, seven hundred thirteen".