726228961 has 2 divisors, whose sum is σ = 726228962. Its totient is φ = 726228960.

The previous prime is 726228947. The next prime is 726228977. The reversal of 726228961 is 169822627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 674388961 + 51840000 = 25969^2 + 7200^2 .

It is a cyclic number.

It is not a de Polignac number, because 726228961 - 2¹¹ = 726226913 is a prime.

It is not a weakly prime, because it can be changed into another prime (726228911) 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, 363114480 + 363114481.

It is an arithmetic number, because the mean of its divisors is an integer number (363114481).

Almost surely, 2^726228961 is an apocalyptic number.

It is an amenable number.

726228961 is a deficient number, since it is larger than the sum of its proper divisors (1).

726228961 is an equidigital number, since it uses as much as digits as its factorization.

726228961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 726228961 is about 26948.6356055367. The cubic root of 726228961 is about 898.8582067987.

The spelling of 726228961 in words is "seven hundred twenty-six million, two hundred twenty-eight thousand, nine hundred sixty-one".