108639963 has 12 divisors (see below), whose sum is σ = 159497728. Its totient is φ = 71238960.

The previous prime is 108639961. The next prime is 108639997. The reversal of 108639963 is 369936801.

108639963 is a `hidden beast` number, since 1 + 0 + 8 + 639 + 9 + 6 + 3 = 666.

It is not a de Polignac number, because 108639963 - 2¹ = 108639961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108639961) 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, 98395 + ... + 99492.

Almost surely, 2^108639963 is an apocalyptic number.

108639963 is a deficient number, since it is larger than the sum of its proper divisors (50857765).

108639963 is a wasteful number, since it uses less digits than its factorization.

108639963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197954 (or 197951 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 108639963 is about 10423.0496017241. The cubic root of 108639963 is about 477.1590914817.

The spelling of 108639963 in words is "one hundred eight million, six hundred thirty-nine thousand, nine hundred sixty-three".