944639 has 8 divisors (see below), whose sum is σ = 1009008. Its totient is φ = 881280.

The previous prime is 944621. The next prime is 944651. The reversal of 944639 is 936449.

It is a happy number.

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

It is not a de Polignac number, because 944639 - 2¹² = 940543 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 944599 and 944608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (944609) 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, 2924 + ... + 3230.

It is an arithmetic number, because the mean of its divisors is an integer number (126126).

2⁹⁴⁴⁶³⁹ is an apocalyptic number.

944639 is a deficient number, since it is larger than the sum of its proper divisors (64369).

944639 is a wasteful number, since it uses less digits than its factorization.

944639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its digits is 23328, while the sum is 35.

The square root of 944639 is about 971.9254086606. The cubic root of 944639 is about 98.1194918947.

The spelling of 944639 in words is "nine hundred forty-four thousand, six hundred thirty-nine".