726770017 has 2 divisors, whose sum is σ = 726770018. Its totient is φ = 726770016.

The previous prime is 726769997. The next prime is 726770027. The reversal of 726770017 is 710077627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 482285521 + 244484496 = 21961^2 + 15636^2 .

It is a cyclic number.

It is not a de Polignac number, because 726770017 - 2⁷ = 726769889 is a prime.

It is a super-2 number, since 2×726770017² = 1056389315220360578, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (726770027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363385008 + 363385009.

It is an arithmetic number, because the mean of its divisors is an integer number (363385009).

Almost surely, 2^726770017 is an apocalyptic number.

It is an amenable number.

726770017 is a deficient number, since it is larger than the sum of its proper divisors (1).

726770017 is an equidigital number, since it uses as much as digits as its factorization.

726770017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28812, while the sum is 37.

The square root of 726770017 is about 26958.6723894186. The cubic root of 726770017 is about 899.0813742046.

It can be divided in two parts, 7267 and 70017, that added together give a square (77284 = 278²).

The spelling of 726770017 in words is "seven hundred twenty-six million, seven hundred seventy thousand, seventeen".