726622931 has 2 divisors, whose sum is σ = 726622932. Its totient is φ = 726622930.

The previous prime is 726622921. The next prime is 726622957. The reversal of 726622931 is 139226627.

It is a weak prime.

It is an emirp because it is prime and its reverse (139226627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726622931 - 2²⁶ = 659514067 is a prime.

It is a super-2 number, since 2×726622931² = 1055961767710061522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (726622921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363311465 + 363311466.

It is an arithmetic number, because the mean of its divisors is an integer number (363311466).

Almost surely, 2^726622931 is an apocalyptic number.

726622931 is a deficient number, since it is larger than the sum of its proper divisors (1).

726622931 is an equidigital number, since it uses as much as digits as its factorization.

726622931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 726622931 is about 26955.9442609603. The cubic root of 726622931 is about 899.0207171411.

The spelling of 726622931 in words is "seven hundred twenty-six million, six hundred twenty-two thousand, nine hundred thirty-one".