564660731 has 2 divisors, whose sum is σ = 564660732. Its totient is φ = 564660730.

The previous prime is 564660727. The next prime is 564660743. The reversal of 564660731 is 137066465.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 564660731 - 2² = 564660727 is a prime.

It is a super-2 number, since 2×564660731² = 637683482266908722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (564660751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282330365 + 282330366.

It is an arithmetic number, because the mean of its divisors is an integer number (282330366).

Almost surely, 2^564660731 is an apocalyptic number.

564660731 is a deficient number, since it is larger than the sum of its proper divisors (1).

564660731 is an equidigital number, since it uses as much as digits as its factorization.

564660731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 564660731 is about 23762.5909992997. The cubic root of 564660731 is about 826.5374360256.

The spelling of 564660731 in words is "five hundred sixty-four million, six hundred sixty thousand, seven hundred thirty-one".