726126613 has 2 divisors, whose sum is σ = 726126614. Its totient is φ = 726126612.

The previous prime is 726126607. The next prime is 726126623. The reversal of 726126613 is 316621627.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 701296324 + 24830289 = 26482^2 + 4983^2 .

It is a cyclic number.

It is not a de Polignac number, because 726126613 - 2²⁹ = 189255701 is a prime.

It is a super-4 number, since 4×726126613⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726126623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363063306 + 363063307.

It is an arithmetic number, because the mean of its divisors is an integer number (363063307).

Almost surely, 2^726126613 is an apocalyptic number.

It is an amenable number.

726126613 is a deficient number, since it is larger than the sum of its proper divisors (1).

726126613 is an equidigital number, since it uses as much as digits as its factorization.

726126613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 726126613 is about 26946.7365927676. The cubic root of 726126613 is about 898.8159792246.

The spelling of 726126613 in words is "seven hundred twenty-six million, one hundred twenty-six thousand, six hundred thirteen".