138693194 has 8 divisors (see below), whose sum is σ = 214750848. Its totient is φ = 67109580.

The previous prime is 138693173. The next prime is 138693221. The reversal of 138693194 is 491396831.

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, 1118432 + ... + 1118555.

It is an arithmetic number, because the mean of its divisors is an integer number (26843856).

Almost surely, 2^138693194 is an apocalyptic number.

138693194 is a deficient number, since it is larger than the sum of its proper divisors (76057654).

138693194 is a wasteful number, since it uses less digits than its factorization.

138693194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237020.

The product of its digits is 139968, while the sum is 44.

The square root of 138693194 is about 11776.8074621266. The cubic root of 138693194 is about 517.6287421919.

The spelling of 138693194 in words is "one hundred thirty-eight million, six hundred ninety-three thousand, one hundred ninety-four".