722684791 has 2 divisors, whose sum is σ = 722684792. Its totient is φ = 722684790.

The previous prime is 722684759. The next prime is 722684821. The reversal of 722684791 is 197486227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 722684791 - 2⁵ = 722684759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722684731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361342395 + 361342396.

It is an arithmetic number, because the mean of its divisors is an integer number (361342396).

Almost surely, 2^722684791 is an apocalyptic number.

722684791 is a deficient number, since it is larger than the sum of its proper divisors (1).

722684791 is an equidigital number, since it uses as much as digits as its factorization.

722684791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 722684791 is about 26882.7973060841. The cubic root of 722684791 is about 897.3936077566.

The spelling of 722684791 in words is "seven hundred twenty-two million, six hundred eighty-four thousand, seven hundred ninety-one".