726456691 has 2 divisors, whose sum is σ = 726456692. Its totient is φ = 726456690.

The previous prime is 726456683. The next prime is 726456719. The reversal of 726456691 is 196654627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726456691 - 2³ = 726456683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (726456091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363228345 + 363228346.

It is an arithmetic number, because the mean of its divisors is an integer number (363228346).

Almost surely, 2^726456691 is an apocalyptic number.

726456691 is a deficient number, since it is larger than the sum of its proper divisors (1).

726456691 is an equidigital number, since it uses as much as digits as its factorization.

726456691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 726456691 is about 26952.8605346446. The cubic root of 726456691 is about 898.9521512698.

The spelling of 726456691 in words is "seven hundred twenty-six million, four hundred fifty-six thousand, six hundred ninety-one".