744243621 has 8 divisors (see below), whose sum is σ = 1082536224. Its totient is φ = 451056720.

The previous prime is 744243611. The next prime is 744243659. The reversal of 744243621 is 126342447.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 744243621 - 2⁵ = 744243589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 22552837 = 744243621 / (7 + 4 + 4 + 2 + 4 + 3 + 6 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744243601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11276386 + ... + 11276451.

It is an arithmetic number, because the mean of its divisors is an integer number (135317028).

Almost surely, 2^744243621 is an apocalyptic number.

It is an amenable number.

744243621 is a deficient number, since it is larger than the sum of its proper divisors (338292603).

744243621 is a wasteful number, since it uses less digits than its factorization.

744243621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22552851.

The product of its digits is 32256, while the sum is 33.

The square root of 744243621 is about 27280.8288180546. The cubic root of 744243621 is about 906.2298718891.

The spelling of 744243621 in words is "seven hundred forty-four million, two hundred forty-three thousand, six hundred twenty-one".