138871706 has 8 divisors (see below), whose sum is σ = 209948160. Its totient is φ = 68888988.

The previous prime is 138871679. The next prime is 138871717. The reversal of 138871706 is 607178831.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273116 + ... + 273623.

It is an arithmetic number, because the mean of its divisors is an integer number (26243520).

Almost surely, 2^138871706 is an apocalyptic number.

138871706 is a deficient number, since it is larger than the sum of its proper divisors (71076454).

138871706 is a wasteful number, since it uses less digits than its factorization.

138871706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546868.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 138871706 is about 11784.3839889915. The cubic root of 138871706 is about 517.8507269525.

The spelling of 138871706 in words is "one hundred thirty-eight million, eight hundred seventy-one thousand, seven hundred six".