108972139 has 2 divisors, whose sum is σ = 108972140. Its totient is φ = 108972138.

The previous prime is 108972131. The next prime is 108972167. The reversal of 108972139 is 931279801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 108972139 - 2³ = 108972131 is a prime.

It is not a weakly prime, because it can be changed into another prime (108972131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54486069 + 54486070.

It is an arithmetic number, because the mean of its divisors is an integer number (54486070).

Almost surely, 2^108972139 is an apocalyptic number.

108972139 is a deficient number, since it is larger than the sum of its proper divisors (1).

108972139 is an equidigital number, since it uses as much as digits as its factorization.

108972139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 108972139 is about 10438.9721237294. The cubic root of 108972139 is about 477.6449149442.

The spelling of 108972139 in words is "one hundred eight million, nine hundred seventy-two thousand, one hundred thirty-nine".