744643 has 4 divisors (see below), whose sum is σ = 747040. Its totient is φ = 742248.

The previous prime is 744641. The next prime is 744649. The reversal of 744643 is 346447.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 744643 - 2¹ = 744641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (744641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648 + ... + 1381.

It is an arithmetic number, because the mean of its divisors is an integer number (186760).

2⁷⁴⁴⁶⁴³ is an apocalyptic number.

744643 is a deficient number, since it is larger than the sum of its proper divisors (2397).

744643 is a wasteful number, since it uses less digits than its factorization.

744643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396.

The product of its digits is 8064, while the sum is 28.

The square root of 744643 is about 862.9269957534. The cubic root of 744643 is about 90.6391944473.

The spelling of 744643 in words is "seven hundred forty-four thousand, six hundred forty-three".