726605393 has 4 divisors (see below), whose sum is σ = 731909220. Its totient is φ = 721301568.

The previous prime is 726605389. The next prime is 726605417. The reversal of 726605393 is 393506627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393506627 = 18793 ⋅20939.

It can be written as a sum of positive squares in 2 ways, for example, as 616628224 + 109977169 = 24832^2 + 10487^2 .

It is a cyclic number.

It is not a de Polignac number, because 726605393 - 2² = 726605389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726605393.

It is not an unprimeable number, because it can be changed into a prime (726605303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2651708 + ... + 2651981.

It is an arithmetic number, because the mean of its divisors is an integer number (182977305).

Almost surely, 2^726605393 is an apocalyptic number.

It is an amenable number.

726605393 is a deficient number, since it is larger than the sum of its proper divisors (5303827).

726605393 is a wasteful number, since it uses less digits than its factorization.

726605393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303826.

The product of its (nonzero) digits is 204120, while the sum is 41.

The square root of 726605393 is about 26955.6189504155. The cubic root of 726605393 is about 899.0134840671.

The spelling of 726605393 in words is "seven hundred twenty-six million, six hundred five thousand, three hundred ninety-three".