138900265 has 16 divisors (see below), whose sum is σ = 191192832. Its totient is φ = 94895424.

The previous prime is 138900263. The next prime is 138900271. The reversal of 138900265 is 562009831.

It is a cyclic number.

It is not a de Polignac number, because 138900265 - 2¹ = 138900263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138900265.

It is not an unprimeable number, because it can be changed into a prime (138900263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2532 + ... + 16858.

It is an arithmetic number, because the mean of its divisors is an integer number (11949552).

Almost surely, 2^138900265 is an apocalyptic number.

It is an amenable number.

138900265 is a deficient number, since it is larger than the sum of its proper divisors (52292567).

138900265 is a wasteful number, since it uses less digits than its factorization.

138900265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14616.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 138900265 is about 11785.5956574116. The cubic root of 138900265 is about 517.8862232285.

The spelling of 138900265 in words is "one hundred thirty-eight million, nine hundred thousand, two hundred sixty-five".