726949393 has 16 divisors (see below), whose sum is σ = 790053264. Its totient is φ = 666173440.

The previous prime is 726949387. The next prime is 726949417. The reversal of 726949393 is 393949627.

It can be written as a sum of positive squares in 8 ways, for example, as 1024144 + 725925249 = 1012^2 + 26943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726949393 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 726949393.

It is not an unprimeable number, because it can be changed into a prime (726949313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596721 + ... + 597937.

It is an arithmetic number, because the mean of its divisors is an integer number (49378329).

Almost surely, 2^726949393 is an apocalyptic number.

It is an amenable number.

726949393 is a deficient number, since it is larger than the sum of its proper divisors (63103871).

726949393 is a wasteful number, since it uses less digits than its factorization.

726949393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132.

The product of its digits is 2204496, while the sum is 52.

The square root of 726949393 is about 26961.9990542244. Note that the first 3 decimals coincide. The cubic root of 726949393 is about 899.1553363249.

The spelling of 726949393 in words is "seven hundred twenty-six million, nine hundred forty-nine thousand, three hundred ninety-three".