726106709 has 2 divisors, whose sum is σ = 726106710. Its totient is φ = 726106708.

The previous prime is 726106663. The next prime is 726106741. The reversal of 726106709 is 907601627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491863684 + 234243025 = 22178^2 + 15305^2 .

It is a cyclic number.

It is not a de Polignac number, because 726106709 - 2⁸ = 726106453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726106009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363053354 + 363053355.

It is an arithmetic number, because the mean of its divisors is an integer number (363053355).

Almost surely, 2^726106709 is an apocalyptic number.

It is an amenable number.

726106709 is a deficient number, since it is larger than the sum of its proper divisors (1).

726106709 is an equidigital number, since it uses as much as digits as its factorization.

726106709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 726106709 is about 26946.3672690773. The cubic root of 726106709 is about 898.8077666088.

The spelling of 726106709 in words is "seven hundred twenty-six million, one hundred six thousand, seven hundred nine".