138694 has 8 divisors (see below), whose sum is σ = 214848. Its totient is φ = 67080.

The previous prime is 138683. The next prime is 138727. The reversal of 138694 is 496831.

138694 = T₁₄₆ + T₁₄₇ + ... + T₁₅₇.

138694 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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, 1057 + ... + 1180.

It is an arithmetic number, because the mean of its divisors is an integer number (26856).

2¹³⁸⁶⁹⁴ is an apocalyptic number.

138694 is a deficient number, since it is larger than the sum of its proper divisors (76154).

138694 is a wasteful number, since it uses less digits than its factorization.

138694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270.

The product of its digits is 5184, while the sum is 31.

The square root of 138694 is about 372.4164335794. The cubic root of 138694 is about 51.7629744904.

The spelling of 138694 in words is "one hundred thirty-eight thousand, six hundred ninety-four".