138416494 has 4 divisors (see below), whose sum is σ = 207624744. Its totient is φ = 69208246.

The previous prime is 138416489. The next prime is 138416513. The reversal of 138416494 is 494614831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 494614831 = 839 ⋅589529.

It is a super-2 number, since 2×138416494² = 38318251622504072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34604122 + ... + 34604125.

It is an arithmetic number, because the mean of its divisors is an integer number (51906186).

Almost surely, 2^138416494 is an apocalyptic number.

138416494 is a deficient number, since it is larger than the sum of its proper divisors (69208250).

138416494 is an equidigital number, since it uses as much as digits as its factorization.

138416494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69208249.

The product of its digits is 82944, while the sum is 40.

The square root of 138416494 is about 11765.0539310281. The cubic root of 138416494 is about 517.2842810987.

The spelling of 138416494 in words is "one hundred thirty-eight million, four hundred sixteen thousand, four hundred ninety-four".