726385993 has 4 divisors (see below), whose sum is σ = 738697680. Its totient is φ = 714074308.

The previous prime is 726385951. The next prime is 726386021. The reversal of 726385993 is 399583627.

726385993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726385993 is a prime.

It is a super-2 number, since 2×726385993² = 1055273221653192098, which contains 22 as substring.

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 726385993.

It is not an unprimeable number, because it can be changed into a prime (726385393) 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, 6155755 + ... + 6155872.

It is an arithmetic number, because the mean of its divisors is an integer number (184674420).

Almost surely, 2^726385993 is an apocalyptic number.

It is an amenable number.

726385993 is a deficient number, since it is larger than the sum of its proper divisors (12311687).

726385993 is a wasteful number, since it uses less digits than its factorization.

726385993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12311686.

The product of its digits is 2449440, while the sum is 52.

The square root of 726385993 is about 26951.5489907352. The cubic root of 726385993 is about 898.9229886316.

The spelling of 726385993 in words is "seven hundred twenty-six million, three hundred eighty-five thousand, nine hundred ninety-three".