744812813 has 4 divisors (see below), whose sum is σ = 745964640. Its totient is φ = 743660988.

The previous prime is 744812801. The next prime is 744812833. The reversal of 744812813 is 318218447.

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 not a de Polignac number, because 744812813 - 2⁴ = 744812797 is a prime.

It is a super-2 number, since 2×744812813² = 1109492252817945938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744812833) 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, 574943 + ... + 576236.

It is an arithmetic number, because the mean of its divisors is an integer number (186491160).

Almost surely, 2^744812813 is an apocalyptic number.

It is an amenable number.

744812813 is a deficient number, since it is larger than the sum of its proper divisors (1151827).

744812813 is a wasteful number, since it uses less digits than its factorization.

744812813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151826.

The product of its digits is 43008, while the sum is 38.

The square root of 744812813 is about 27291.2589119667. The cubic root of 744812813 is about 906.4608389794.

The spelling of 744812813 in words is "seven hundred forty-four million, eight hundred twelve thousand, eight hundred thirteen".