726475691 has 2 divisors, whose sum is σ = 726475692. Its totient is φ = 726475690.

The previous prime is 726475667. The next prime is 726475693. The reversal of 726475691 is 196574627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 726475691 - 2²² = 722281387 is a prime.

It is a super-2 number, since 2×726475691² = 1055533859227854962, which contains 22 as substring.

Together with 726475693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (726475693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363237845 + 363237846.

It is an arithmetic number, because the mean of its divisors is an integer number (363237846).

Almost surely, 2^726475691 is an apocalyptic number.

726475691 is a deficient number, since it is larger than the sum of its proper divisors (1).

726475691 is an equidigital number, since it uses as much as digits as its factorization.

726475691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 726475691 is about 26953.2129995665. The cubic root of 726475691 is about 898.9599883702.

The spelling of 726475691 in words is "seven hundred twenty-six million, four hundred seventy-five thousand, six hundred ninety-one".