963639 has 6 divisors (see below), whose sum is σ = 1391936. Its totient is φ = 642420.

The previous prime is 963629. The next prime is 963643. The reversal of 963639 is 936369.

It is not a de Polignac number, because 963639 - 2⁵ = 963607 is a prime.

It is a Duffinian number.

963639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (963629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53527 + ... + 53544.

2⁹⁶³⁶³⁹ is an apocalyptic number.

963639 is a deficient number, since it is larger than the sum of its proper divisors (428297).

963639 is a wasteful number, since it uses less digits than its factorization.

963639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107077 (or 107074 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 963639 is about 981.6511600360. The cubic root of 963639 is about 98.7729722766.

The spelling of 963639 in words is "nine hundred sixty-three thousand, six hundred thirty-nine".