720622313 has 2 divisors, whose sum is σ = 720622314. Its totient is φ = 720622312.

The previous prime is 720622303. The next prime is 720622321. The reversal of 720622313 is 313226027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 687121369 + 33500944 = 26213^2 + 5788^2 .

It is an emirp because it is prime and its reverse (313226027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720622313 - 2¹⁸ = 720360169 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (720622303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360311156 + 360311157.

It is an arithmetic number, because the mean of its divisors is an integer number (360311157).

Almost surely, 2^720622313 is an apocalyptic number.

It is an amenable number.

720622313 is a deficient number, since it is larger than the sum of its proper divisors (1).

720622313 is an equidigital number, since it uses as much as digits as its factorization.

720622313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 720622313 is about 26844.4093434741. The cubic root of 720622313 is about 896.5391005459.

The spelling of 720622313 in words is "seven hundred twenty million, six hundred twenty-two thousand, three hundred thirteen".