138473494 has 8 divisors (see below), whose sum is σ = 208219320. Its totient is φ = 69067056.

The previous prime is 138473453. The next prime is 138473527. The reversal of 138473494 is 494374831.

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

It is a self number, because there is not a number n which added to its sum of digits gives 138473494.

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, 83824 + ... + 85459.

It is an arithmetic number, because the mean of its divisors is an integer number (26027415).

Almost surely, 2^138473494 is an apocalyptic number.

138473494 is a deficient number, since it is larger than the sum of its proper divisors (69745826).

138473494 is a wasteful number, since it uses less digits than its factorization.

138473494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169694.

The product of its digits is 290304, while the sum is 43.

The square root of 138473494 is about 11767.4761100246. The cubic root of 138473494 is about 517.3552773525.

The spelling of 138473494 in words is "one hundred thirty-eight million, four hundred seventy-three thousand, four hundred ninety-four".