726006691 has 2 divisors, whose sum is σ = 726006692. Its totient is φ = 726006690.

The previous prime is 726006683. The next prime is 726006719. The reversal of 726006691 is 196600627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726006691 - 2³ = 726006683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 726006691.

It is not a weakly prime, because it can be changed into another prime (726007691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363003345 + 363003346.

It is an arithmetic number, because the mean of its divisors is an integer number (363003346).

Almost surely, 2^726006691 is an apocalyptic number.

726006691 is a deficient number, since it is larger than the sum of its proper divisors (1).

726006691 is an equidigital number, since it uses as much as digits as its factorization.

726006691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 726006691 is about 26944.5113334794. The cubic root of 726006691 is about 898.7664957772.

The spelling of 726006691 in words is "seven hundred twenty-six million, six thousand, six hundred ninety-one".