712640723 has 2 divisors, whose sum is σ = 712640724. Its totient is φ = 712640722.

The previous prime is 712640701. The next prime is 712640737. The reversal of 712640723 is 327046217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 712640723 - 2⁶ = 712640659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 712640723.

It is not a weakly prime, because it can be changed into another prime (712640783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356320361 + 356320362.

It is an arithmetic number, because the mean of its divisors is an integer number (356320362).

Almost surely, 2^712640723 is an apocalyptic number.

712640723 is a deficient number, since it is larger than the sum of its proper divisors (1).

712640723 is an equidigital number, since it uses as much as digits as its factorization.

712640723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 712640723 is about 26695.3314832388. The cubic root of 712640723 is about 893.2167913270.

The spelling of 712640723 in words is "seven hundred twelve million, six hundred forty thousand, seven hundred twenty-three".