726742691 has 2 divisors, whose sum is σ = 726742692. Its totient is φ = 726742690.

The previous prime is 726742669. The next prime is 726742729. The reversal of 726742691 is 196247627.

726742691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726742691 is a prime.

It is not a weakly prime, because it can be changed into another prime (726742631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363371345 + 363371346.

It is an arithmetic number, because the mean of its divisors is an integer number (363371346).

Almost surely, 2^726742691 is an apocalyptic number.

726742691 is a deficient number, since it is larger than the sum of its proper divisors (1).

726742691 is an equidigital number, since it uses as much as digits as its factorization.

726742691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 726742691 is about 26958.1655718634. The cubic root of 726742691 is about 899.0701058047.

The spelling of 726742691 in words is "seven hundred twenty-six million, seven hundred forty-two thousand, six hundred ninety-one".