138813706 has 8 divisors (see below), whose sum is σ = 209300004. Its totient is φ = 69047040.

The previous prime is 138813673. The next prime is 138813799. The reversal of 138813706 is 607318831.

It can be written as a sum of positive squares in 2 ways, for example, as 135606025 + 3207681 = 11645^2 + 1791^2 .

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, 179425 + ... + 180196.

Almost surely, 2^138813706 is an apocalyptic number.

138813706 is a deficient number, since it is larger than the sum of its proper divisors (70486298).

138813706 is a wasteful number, since it uses less digits than its factorization.

138813706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359816.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 138813706 is about 11781.9228481602. The cubic root of 138813706 is about 517.7786231731.

The spelling of 138813706 in words is "one hundred thirty-eight million, eight hundred thirteen thousand, seven hundred six".