138975317 has 4 divisors (see below), whose sum is σ = 149665740. Its totient is φ = 128284896.

The previous prime is 138975313. The next prime is 138975371. The reversal of 138975317 is 713579831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42954916 + 96020401 = 6554^2 + 9799^2 .

It is a cyclic number.

It is not a de Polignac number, because 138975317 - 2² = 138975313 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138975313) 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, 5345192 + ... + 5345217.

It is an arithmetic number, because the mean of its divisors is an integer number (37416435).

Almost surely, 2^138975317 is an apocalyptic number.

It is an amenable number.

138975317 is a deficient number, since it is larger than the sum of its proper divisors (10690423).

138975317 is a wasteful number, since it uses less digits than its factorization.

138975317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10690422.

The product of its digits is 158760, while the sum is 44.

The square root of 138975317 is about 11788.7792837087. The cubic root of 138975317 is about 517.9794829458.

The spelling of 138975317 in words is "one hundred thirty-eight million, nine hundred seventy-five thousand, three hundred seventeen".