726530813 has 2 divisors, whose sum is σ = 726530814. Its totient is φ = 726530812.

The previous prime is 726530807. The next prime is 726530843. The reversal of 726530813 is 318035627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633176569 + 93354244 = 25163^2 + 9662^2 .

It is a cyclic number.

It is not a de Polignac number, because 726530813 - 2²⁶ = 659421949 is a prime.

It is a super-3 number, since 3×726530813³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726530843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363265406 + 363265407.

It is an arithmetic number, because the mean of its divisors is an integer number (363265407).

Almost surely, 2^726530813 is an apocalyptic number.

It is an amenable number.

726530813 is a deficient number, since it is larger than the sum of its proper divisors (1).

726530813 is an equidigital number, since it uses as much as digits as its factorization.

726530813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 726530813 is about 26954.2355298754. The cubic root of 726530813 is about 898.9827242625.

The spelling of 726530813 in words is "seven hundred twenty-six million, five hundred thirty thousand, eight hundred thirteen".