138969574 has 8 divisors (see below), whose sum is σ = 208950768. Its totient is φ = 69319320.

The previous prime is 138969569. The next prime is 138969581. The reversal of 138969574 is 475969831.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81682 + ... + 83365.

It is an arithmetic number, because the mean of its divisors is an integer number (26118846).

Almost surely, 2^138969574 is an apocalyptic number.

138969574 is a deficient number, since it is larger than the sum of its proper divisors (69981194).

138969574 is a wasteful number, since it uses less digits than its factorization.

138969574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165470.

The product of its digits is 1632960, while the sum is 52.

The square root of 138969574 is about 11788.5357021133. The cubic root of 138969574 is about 517.9723478727.

The spelling of 138969574 in words is "one hundred thirty-eight million, nine hundred sixty-nine thousand, five hundred seventy-four".