723317381 has 2 divisors, whose sum is σ = 723317382. Its totient is φ = 723317380.

The previous prime is 723317359. The next prime is 723317429. The reversal of 723317381 is 183713327.

723317381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504721156 + 218596225 = 22466^2 + 14785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-723317381 is a prime.

It is a super-2 number, since 2×723317381² = 1046376067313398322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723317311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361658690 + 361658691.

It is an arithmetic number, because the mean of its divisors is an integer number (361658691).

Almost surely, 2^723317381 is an apocalyptic number.

It is an amenable number.

723317381 is a deficient number, since it is larger than the sum of its proper divisors (1).

723317381 is an equidigital number, since it uses as much as digits as its factorization.

723317381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 723317381 is about 26894.5604351512. The cubic root of 723317381 is about 897.6553708714.

The spelling of 723317381 in words is "seven hundred twenty-three million, three hundred seventeen thousand, three hundred eighty-one".