720564433 has 2 divisors, whose sum is σ = 720564434. Its totient is φ = 720564432.

The previous prime is 720564389. The next prime is 720564437. The reversal of 720564433 is 334465027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706071184 + 14493249 = 26572^2 + 3807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720564433 is a prime.

It is a super-2 number, since 2×720564433² = 1038426204209222978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (720564437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360282216 + 360282217.

It is an arithmetic number, because the mean of its divisors is an integer number (360282217).

Almost surely, 2^720564433 is an apocalyptic number.

It is an amenable number.

720564433 is a deficient number, since it is larger than the sum of its proper divisors (1).

720564433 is an equidigital number, since it uses as much as digits as its factorization.

720564433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 34.

The square root of 720564433 is about 26843.3312575023. The cubic root of 720564433 is about 896.5150967223.

The spelling of 720564433 in words is "seven hundred twenty million, five hundred sixty-four thousand, four hundred thirty-three".