726904891 has 2 divisors, whose sum is σ = 726904892. Its totient is φ = 726904890.

The previous prime is 726904883. The next prime is 726904943. The reversal of 726904891 is 198409627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726904891 - 2³ = 726904883 is a prime.

It is not a weakly prime, because it can be changed into another prime (726904291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363452445 + 363452446.

It is an arithmetic number, because the mean of its divisors is an integer number (363452446).

Almost surely, 2^726904891 is an apocalyptic number.

726904891 is a deficient number, since it is larger than the sum of its proper divisors (1).

726904891 is an equidigital number, since it uses as much as digits as its factorization.

726904891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 726904891 is about 26961.1737689589. The cubic root of 726904891 is about 899.1369879466.

The spelling of 726904891 in words is "seven hundred twenty-six million, nine hundred four thousand, eight hundred ninety-one".