726365531 has 2 divisors, whose sum is σ = 726365532. Its totient is φ = 726365530.

The previous prime is 726365509. The next prime is 726365533. The reversal of 726365531 is 135563627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 726365531 - 2⁶ = 726365467 is a prime.

It is a super-2 number, since 2×726365531² = 1055213769249823922, which contains 22 as substring.

Together with 726365533, 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 (726365533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363182765 + 363182766.

It is an arithmetic number, because the mean of its divisors is an integer number (363182766).

Almost surely, 2^726365531 is an apocalyptic number.

726365531 is a deficient number, since it is larger than the sum of its proper divisors (1).

726365531 is an equidigital number, since it uses as much as digits as its factorization.

726365531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 38.

The square root of 726365531 is about 26951.1693809378. The cubic root of 726365531 is about 898.9145477865.

The spelling of 726365531 in words is "seven hundred twenty-six million, three hundred sixty-five thousand, five hundred thirty-one".