722791 has 2 divisors, whose sum is σ = 722792. Its totient is φ = 722790.

The previous prime is 722783. The next prime is 722797. The reversal of 722791 is 197227.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 722791 - 2³ = 722783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361395 + 361396.

It is an arithmetic number, because the mean of its divisors is an integer number (361396).

2⁷²²⁷⁹¹ is an apocalyptic number.

722791 is a deficient number, since it is larger than the sum of its proper divisors (1).

722791 is an equidigital number, since it uses as much as digits as its factorization.

722791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 28.

The square root of 722791 is about 850.1711592380. The cubic root of 722791 is about 89.7437567267.

The spelling of 722791 in words is "seven hundred twenty-two thousand, seven hundred ninety-one".