673400723 has 2 divisors, whose sum is σ = 673400724. Its totient is φ = 673400722.

The previous prime is 673400701. The next prime is 673400731. The reversal of 673400723 is 327004376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 673400723 - 2⁶ = 673400659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 673400723.

It is not a weakly prime, because it can be changed into another prime (673400773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336700361 + 336700362.

It is an arithmetic number, because the mean of its divisors is an integer number (336700362).

Almost surely, 2^673400723 is an apocalyptic number.

673400723 is a deficient number, since it is larger than the sum of its proper divisors (1).

673400723 is an equidigital number, since it uses as much as digits as its factorization.

673400723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 32.

The square root of 673400723 is about 25949.9657610564. The cubic root of 673400723 is about 876.5119862963.

The spelling of 673400723 in words is "six hundred seventy-three million, four hundred thousand, seven hundred twenty-three".