726939613 has 2 divisors, whose sum is σ = 726939614. Its totient is φ = 726939612.

The previous prime is 726939611. The next prime is 726939671. The reversal of 726939613 is 316939627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501849604 + 225090009 = 22402^2 + 15003^2 .

It is a cyclic number.

It is not a de Polignac number, because 726939613 - 2¹ = 726939611 is a prime.

Together with 726939611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726939611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363469806 + 363469807.

It is an arithmetic number, because the mean of its divisors is an integer number (363469807).

Almost surely, 2^726939613 is an apocalyptic number.

It is an amenable number.

726939613 is a deficient number, since it is larger than the sum of its proper divisors (1).

726939613 is an equidigital number, since it uses as much as digits as its factorization.

726939613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 46.

The square root of 726939613 is about 26961.8176872406. The cubic root of 726939613 is about 899.1513040503.

The spelling of 726939613 in words is "seven hundred twenty-six million, nine hundred thirty-nine thousand, six hundred thirteen".