723710609 has 2 divisors, whose sum is σ = 723710610. Its totient is φ = 723710608.

The previous prime is 723710591. The next prime is 723710711. The reversal of 723710609 is 906017327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548730625 + 174979984 = 23425^2 + 13228^2 .

It is a cyclic number.

It is not a de Polignac number, because 723710609 - 2²⁸ = 455275153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (723710909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361855304 + 361855305.

It is an arithmetic number, because the mean of its divisors is an integer number (361855305).

Almost surely, 2^723710609 is an apocalyptic number.

It is an amenable number.

723710609 is a deficient number, since it is larger than the sum of its proper divisors (1).

723710609 is an equidigital number, since it uses as much as digits as its factorization.

723710609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 723710609 is about 26901.8699907646. The cubic root of 723710609 is about 897.8180100710.

The spelling of 723710609 in words is "seven hundred twenty-three million, seven hundred ten thousand, six hundred nine".