723406709 has 2 divisors, whose sum is σ = 723406710. Its totient is φ = 723406708.

The previous prime is 723406693. The next prime is 723406727. The reversal of 723406709 is 907604327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361836484 + 361570225 = 19022^2 + 19015^2 .

It is a cyclic number.

It is not a de Polignac number, because 723406709 - 2⁴ = 723406693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723406609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361703354 + 361703355.

It is an arithmetic number, because the mean of its divisors is an integer number (361703355).

Almost surely, 2^723406709 is an apocalyptic number.

It is an amenable number.

723406709 is a deficient number, since it is larger than the sum of its proper divisors (1).

723406709 is an equidigital number, since it uses as much as digits as its factorization.

723406709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 723406709 is about 26896.2210914470. The cubic root of 723406709 is about 897.6923221280.

The spelling of 723406709 in words is "seven hundred twenty-three million, four hundred six thousand, seven hundred nine".