744549321 has 8 divisors (see below), whose sum is σ = 993867904. Its totient is φ = 495798480.

The previous prime is 744549313. The next prime is 744549361. The reversal of 744549321 is 123945447.

744549321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 744549321 - 2³ = 744549313 is a prime.

It is a super-2 number, since 2×744549321² = 1108707382803122082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 744549321.

It is not an unprimeable number, because it can be changed into a prime (744549361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138865 + ... + 144126.

It is an arithmetic number, because the mean of its divisors is an integer number (124233488).

Almost surely, 2^744549321 is an apocalyptic number.

It is an amenable number.

744549321 is a deficient number, since it is larger than the sum of its proper divisors (249318583).

744549321 is a wasteful number, since it uses less digits than its factorization.

744549321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283871.

The product of its digits is 120960, while the sum is 39.

The square root of 744549321 is about 27286.4310784683. The cubic root of 744549321 is about 906.3539336621.

The spelling of 744549321 in words is "seven hundred forty-four million, five hundred forty-nine thousand, three hundred twenty-one".