744631 has 4 divisors (see below), whose sum is σ = 761992. Its totient is φ = 727272.

The previous prime is 744607. The next prime is 744637. The reversal of 744631 is 136447.

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 744631 - 2⁵ = 744599 is a prime.

It is a super-2 number, since 2×744631² = 1108950652322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 744596 and 744605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744637) 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 3 ways as a sum of consecutive naturals, for example, 8616 + ... + 8701.

It is an arithmetic number, because the mean of its divisors is an integer number (190498).

2⁷⁴⁴⁶³¹ is an apocalyptic number.

744631 is a deficient number, since it is larger than the sum of its proper divisors (17361).

744631 is a wasteful number, since it uses less digits than its factorization.

744631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17360.

The product of its digits is 2016, while the sum is 25.

The square root of 744631 is about 862.9200426459. The cubic root of 744631 is about 90.6387075579.

Adding to 744631 its product of digits (2016), we get a palindrome (746647).

The spelling of 744631 in words is "seven hundred forty-four thousand, six hundred thirty-one".