45639 has 12 divisors (see below), whose sum is σ = 72072. Its totient is φ = 27600.

The previous prime is 45631. The next prime is 45641. The reversal of 45639 is 93654.

It is a happy number.

45639 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45639 - 2³ = 45631 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132 + ... + 329.

It is an arithmetic number, because the mean of its divisors is an integer number (6006).

2⁴⁵⁶³⁹ is an apocalyptic number.

45639 is a deficient number, since it is larger than the sum of its proper divisors (26433).

45639 is a wasteful number, since it uses less digits than its factorization.

45639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 475 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 45639 is about 213.6328626406. The cubic root of 45639 is about 35.7365019869.

The spelling of 45639 in words is "forty-five thousand, six hundred thirty-nine".