138171698 has 16 divisors (see below), whose sum is σ = 237249600. Its totient is φ = 59120496.

The previous prime is 138171697. The next prime is 138171713. The reversal of 138171698 is 896171831.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (138171697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328 + ... + 16676.

It is an arithmetic number, because the mean of its divisors is an integer number (14828100).

Almost surely, 2^138171698 is an apocalyptic number.

138171698 is a deficient number, since it is larger than the sum of its proper divisors (99077902).

138171698 is a wasteful number, since it uses less digits than its factorization.

138171698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16001.

The product of its digits is 72576, while the sum is 44.

The square root of 138171698 is about 11754.6458049573. The cubic root of 138171698 is about 516.9791540567.

The spelling of 138171698 in words is "one hundred thirty-eight million, one hundred seventy-one thousand, six hundred ninety-eight".