744396813 has 12 divisors (see below), whose sum is σ = 1076318620. Its totient is φ = 495766656.

The previous prime is 744396811. The next prime is 744396827. The reversal of 744396813 is 318693447.

It can be written as a sum of positive squares in 2 ways, for example, as 180714249 + 563682564 = 13443^2 + 23742^2 .

It is not a de Polignac number, because 744396813 - 2¹ = 744396811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744396811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31906 + ... + 50067.

Almost surely, 2^744396813 is an apocalyptic number.

It is an amenable number.

744396813 is a deficient number, since it is larger than the sum of its proper divisors (331921807).

744396813 is a wasteful number, since it uses less digits than its factorization.

744396813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82988 (or 82985 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 744396813 is about 27283.6363595471. The cubic root of 744396813 is about 906.2920458146.

The spelling of 744396813 in words is "seven hundred forty-four million, three hundred ninety-six thousand, eight hundred thirteen".