138939202 has 8 divisors (see below), whose sum is σ = 208474812. Its totient is φ = 69447600.

The previous prime is 138939197. The next prime is 138939233. The reversal of 138939202 is 202939831.

It can be written as a sum of positive squares in 2 ways, for example, as 105657841 + 33281361 = 10279^2 + 5769^2 .

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

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, 1449 + ... + 16732.

Almost surely, 2^138939202 is an apocalyptic number.

138939202 is a deficient number, since it is larger than the sum of its proper divisors (69535610).

138939202 is a wasteful number, since it uses less digits than its factorization.

138939202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22004.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 138939202 is about 11787.2474310163. The cubic root of 138939202 is about 517.9346105898.

The spelling of 138939202 in words is "one hundred thirty-eight million, nine hundred thirty-nine thousand, two hundred two".