744170921 has 8 divisors (see below), whose sum is σ = 801819144. Its totient is φ = 686580480.

The previous prime is 744170909. The next prime is 744170923. The reversal of 744170921 is 129071447.

744170921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 216825625 + 527345296 = 14725^2 + 22964^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 744170921 - 2¹⁸ = 743908777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744170923) 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, 14465 + ... + 41201.

It is an arithmetic number, because the mean of its divisors is an integer number (100227393).

Almost surely, 2^744170921 is an apocalyptic number.

It is an amenable number.

744170921 is a deficient number, since it is larger than the sum of its proper divisors (57648223).

744170921 is a wasteful number, since it uses less digits than its factorization.

744170921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28891.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 744170921 is about 27279.4963479900. The cubic root of 744170921 is about 906.2003631569.

The spelling of 744170921 in words is "seven hundred forty-four million, one hundred seventy thousand, nine hundred twenty-one".