138933145 has 16 divisors (see below), whose sum is σ = 180633600. Its totient is φ = 101974464.

The previous prime is 138933131. The next prime is 138933167. The reversal of 138933145 is 541339831.

It is a cyclic number.

It is not a de Polignac number, because 138933145 - 2⁷ = 138933017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4456 + ... + 17254.

It is an arithmetic number, because the mean of its divisors is an integer number (11289600).

Almost surely, 2^138933145 is an apocalyptic number.

It is an amenable number.

138933145 is a deficient number, since it is larger than the sum of its proper divisors (41700455).

138933145 is a wasteful number, since it uses less digits than its factorization.

138933145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12984.

The product of its digits is 38880, while the sum is 37.

The square root of 138933145 is about 11786.9904980024. The cubic root of 138933145 is about 517.9270840951.

The spelling of 138933145 in words is "one hundred thirty-eight million, nine hundred thirty-three thousand, one hundred forty-five".