108639136 has 12 divisors (see below), whose sum is σ = 213883362. Its totient is φ = 54319552.

The previous prime is 108639079. The next prime is 108639161. The reversal of 108639136 is 631936801.

It can be written as a sum of positive squares in only one way, i.e., 107246736 + 1392400 = 10356^2 + 1180^2 .

It is a junction number, because it is equal to n+sod(n) for n = 108639095 and 108639104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1697455 + ... + 1697518.

Almost surely, 2^108639136 is an apocalyptic number.

108639136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

108639136 is a deficient number, since it is larger than the sum of its proper divisors (105244226).

108639136 is an equidigital number, since it uses as much as digits as its factorization.

108639136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394983 (or 3394975 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 108639136 is about 10423.0099299579. The cubic root of 108639136 is about 477.1578807192.

The spelling of 108639136 in words is "one hundred eight million, six hundred thirty-nine thousand, one hundred thirty-six".