138974169 has 8 divisors (see below), whose sum is σ = 185762592. Its totient is φ = 92417600.

The previous prime is 138974141. The next prime is 138974179. The reversal of 138974169 is 961479831.

It is a happy number.

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 138974169 - 2⁵ = 138974137 is a prime.

It is a super-2 number, since 2×138974169² = 38627639298481122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138974179) 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, 56559 + ... + 58964.

It is an arithmetic number, because the mean of its divisors is an integer number (23220324).

Almost surely, 2^138974169 is an apocalyptic number.

It is an amenable number.

138974169 is a deficient number, since it is larger than the sum of its proper divisors (46788423).

138974169 is a wasteful number, since it uses less digits than its factorization.

138974169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115927.

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

The square root of 138974169 is about 11788.7305932403. The cubic root of 138974169 is about 517.9780566923.

The spelling of 138974169 in words is "one hundred thirty-eight million, nine hundred seventy-four thousand, one hundred sixty-nine".