722749 has 2 divisors, whose sum is σ = 722750. Its totient is φ = 722748.

The previous prime is 722737. The next prime is 722783. The reversal of 722749 is 947227.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710649 + 12100 = 843^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 722749 - 2⁹ = 722237 is a prime.

It is a super-2 number, since 2×722749² = 1044732234002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 722749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722149) 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, 361374 + 361375.

It is an arithmetic number, because the mean of its divisors is an integer number (361375).

2⁷²²⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

722749 is a deficient number, since it is larger than the sum of its proper divisors (1).

722749 is an equidigital number, since it uses as much as digits as its factorization.

722749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 722749 is about 850.1464579706. The cubic root of 722749 is about 89.7420184138.

The spelling of 722749 in words is "seven hundred twenty-two thousand, seven hundred forty-nine".