744441643 has 4 divisors (see below), whose sum is σ = 812118168. Its totient is φ = 676765120.

The previous prime is 744441637. The next prime is 744441647. The reversal of 744441643 is 346144447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346144447 = 11 ⋅31467677.

It is a cyclic number.

It is not a de Polignac number, because 744441643 - 2²⁵ = 710887211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744441647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33838246 + ... + 33838267.

It is an arithmetic number, because the mean of its divisors is an integer number (203029542).

Almost surely, 2^744441643 is an apocalyptic number.

744441643 is a deficient number, since it is larger than the sum of its proper divisors (67676525).

744441643 is a wasteful number, since it uses less digits than its factorization.

744441643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67676524.

The product of its digits is 129024, while the sum is 37.

The square root of 744441643 is about 27284.4579018899. The cubic root of 744441643 is about 906.3102387354.

The spelling of 744441643 in words is "seven hundred forty-four million, four hundred forty-one thousand, six hundred forty-three".