138068493 has 8 divisors (see below), whose sum is σ = 184154688. Its totient is φ = 92013984.

The previous prime is 138068467. The next prime is 138068501. The reversal of 138068493 is 394860831.

It is a happy number.

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

It is not a de Polignac number, because 138068493 - 2⁹ = 138067981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138068453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5496 + ... + 17502.

It is an arithmetic number, because the mean of its divisors is an integer number (23019336).

Almost surely, 2^138068493 is an apocalyptic number.

It is an amenable number.

138068493 is a deficient number, since it is larger than the sum of its proper divisors (46086195).

138068493 is a wasteful number, since it uses less digits than its factorization.

138068493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15843.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 138068493 is about 11750.2550185092. The cubic root of 138068493 is about 516.8504057336.

The spelling of 138068493 in words is "one hundred thirty-eight million, sixty-eight thousand, four hundred ninety-three".