138344259 has 8 divisors (see below), whose sum is σ = 186183360. Its totient is φ = 91367336.

The previous prime is 138344251. The next prime is 138344293. The reversal of 138344259 is 952443831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138344259 - 2³ = 138344251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138344251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215169 + ... + 215810.

It is an arithmetic number, because the mean of its divisors is an integer number (23272920).

Almost surely, 2^138344259 is an apocalyptic number.

138344259 is a deficient number, since it is larger than the sum of its proper divisors (47839101).

138344259 is a wasteful number, since it uses less digits than its factorization.

138344259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431089.

The product of its digits is 103680, while the sum is 39.

The square root of 138344259 is about 11761.9836337244. The cubic root of 138344259 is about 517.1942809095.

The spelling of 138344259 in words is "one hundred thirty-eight million, three hundred forty-four thousand, two hundred fifty-nine".