138134994 has 16 divisors (see below), whose sum is σ = 276838560. Its totient is φ = 45950240.

The previous prime is 138134993. The next prime is 138135001. The reversal of 138134994 is 499431831.

138134994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138134993) 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, 20499 + ... + 26390.

It is an arithmetic number, because the mean of its divisors is an integer number (17302410).

Almost surely, 2^138134994 is an apocalyptic number.

138134994 is an abundant number, since it is smaller than the sum of its proper divisors (138703566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138134994 is a wasteful number, since it uses less digits than its factorization.

138134994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47385.

The product of its digits is 93312, while the sum is 42.

The square root of 138134994 is about 11753.0844462209. The cubic root of 138134994 is about 516.9333731344.

It can be divided in two parts, 138134 and 994, that added together give a triangular number (139128 = T₅₂₇).

The spelling of 138134994 in words is "one hundred thirty-eight million, one hundred thirty-four thousand, nine hundred ninety-four".