138361994 has 8 divisors (see below), whose sum is σ = 207992640. Its totient is φ = 69031116.

The previous prime is 138361967. The next prime is 138361999. The reversal of 138361994 is 499163831.

138361994 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 Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138361999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73784 + ... + 75635.

It is an arithmetic number, because the mean of its divisors is an integer number (25999080).

Almost surely, 2^138361994 is an apocalyptic number.

138361994 is a deficient number, since it is larger than the sum of its proper divisors (69630646).

138361994 is a wasteful number, since it uses less digits than its factorization.

138361994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149884.

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

The square root of 138361994 is about 11762.7375215126. The cubic root of 138361994 is about 517.2163804861.

The spelling of 138361994 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, nine hundred ninety-four".