138917694 has 8 divisors (see below), whose sum is σ = 277835400. Its totient is φ = 46305896.

The previous prime is 138917687. The next prime is 138917699. The reversal of 138917694 is 496719831.

It is a happy number.

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

138917694 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138917699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11576469 + ... + 11576480.

It is an arithmetic number, because the mean of its divisors is an integer number (34729425).

Almost surely, 2^138917694 is an apocalyptic number.

138917694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138917694 is a wasteful number, since it uses less digits than its factorization.

138917694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23152954.

The product of its digits is 326592, while the sum is 48.

The square root of 138917694 is about 11786.3350537816. The cubic root of 138917694 is about 517.9078835219.

The spelling of 138917694 in words is "one hundred thirty-eight million, nine hundred seventeen thousand, six hundred ninety-four".