32639 has 4 divisors (see below), whose sum is σ = 33024. Its totient is φ = 32256.

The previous prime is 32633. The next prime is 32647. The reversal of 32639 is 93623.

It is a happy number.

32639 is nontrivially palindromic in base 2 and base 8.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93623 = 251 ⋅373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32639 is a prime.

It is a Duffinian number.

32639 is an undulating number in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 255.

It is an arithmetic number, because the mean of its divisors is an integer number (8256).

2³²⁶³⁹ is an apocalyptic number.

32639 is a deficient number, since it is larger than the sum of its proper divisors (385).

32639 is a wasteful number, since it uses less digits than its factorization.

32639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384.

The product of its digits is 972, while the sum is 23.

The square root of 32639 is about 180.6626690825. The cubic root of 32639 is about 31.9579525872.

The spelling of 32639 in words is "thirty-two thousand, six hundred thirty-nine".