726215723 has 2 divisors, whose sum is σ = 726215724. Its totient is φ = 726215722.

The previous prime is 726215713. The next prime is 726215729. The reversal of 726215723 is 327512627.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726215723 is a prime.

It is not a weakly prime, because it can be changed into another prime (726215729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363107861 + 363107862.

It is an arithmetic number, because the mean of its divisors is an integer number (363107862).

Almost surely, 2^726215723 is an apocalyptic number.

726215723 is a deficient number, since it is larger than the sum of its proper divisors (1).

726215723 is an equidigital number, since it uses as much as digits as its factorization.

726215723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 726215723 is about 26948.3899890142. The cubic root of 726215723 is about 898.8527451799.

The spelling of 726215723 in words is "seven hundred twenty-six million, two hundred fifteen thousand, seven hundred twenty-three".