726819403 has 4 divisors (see below), whose sum is σ = 737056368. Its totient is φ = 716582440.

The previous prime is 726819391. The next prime is 726819433. The reversal of 726819403 is 304918627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 726819403 - 2⁵ = 726819371 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726819433) 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, 5118376 + ... + 5118517.

It is an arithmetic number, because the mean of its divisors is an integer number (184264092).

Almost surely, 2^726819403 is an apocalyptic number.

726819403 is a deficient number, since it is larger than the sum of its proper divisors (10236965).

726819403 is a wasteful number, since it uses less digits than its factorization.

726819403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10236964.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 726819403 is about 26959.5883314267. The cubic root of 726819403 is about 899.1017387518.

The spelling of 726819403 in words is "seven hundred twenty-six million, eight hundred nineteen thousand, four hundred three".