322639 has 4 divisors (see below), whose sum is σ = 339640. Its totient is φ = 305640.

The previous prime is 322633. The next prime is 322649. The reversal of 322639 is 936223.

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 322639 - 2³ = 322631 is a prime.

It is a d-powerful number, because it can be written as 3⁸ + 2 + 6⁵ + 2¹⁷ + 3¹¹ + 9² .

It is a Duffinian number.

322639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (322631) 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, 8472 + ... + 8509.

It is an arithmetic number, because the mean of its divisors is an integer number (84910).

2³²²⁶³⁹ is an apocalyptic number.

322639 is a deficient number, since it is larger than the sum of its proper divisors (17001).

322639 is a wasteful number, since it uses less digits than its factorization.

322639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17000.

The product of its digits is 1944, while the sum is 25.

The square root of 322639 is about 568.0132040719. The cubic root of 322639 is about 68.5865494515.

It can be divided in two parts, 322 and 639, that added together give a square (961 = 31²).

The spelling of 322639 in words is "three hundred twenty-two thousand, six hundred thirty-nine".