723316549 has 2 divisors, whose sum is σ = 723316550. Its totient is φ = 723316548.

The previous prime is 723316543. The next prime is 723316597. The reversal of 723316549 is 945613327.

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., 509630625 + 213685924 = 22575^2 + 14618^2 .

It is a cyclic number.

It is not a de Polignac number, because 723316549 - 2⁷ = 723316421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723316543) 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, 361658274 + 361658275.

It is an arithmetic number, because the mean of its divisors is an integer number (361658275).

Almost surely, 2^723316549 is an apocalyptic number.

It is an amenable number.

723316549 is a deficient number, since it is larger than the sum of its proper divisors (1).

723316549 is an equidigital number, since it uses as much as digits as its factorization.

723316549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 723316549 is about 26894.5449673349. The cubic root of 723316549 is about 897.6550266935.

The spelling of 723316549 in words is "seven hundred twenty-three million, three hundred sixteen thousand, five hundred forty-nine".