138416493 has 8 divisors (see below), whose sum is σ = 184618656. Its totient is φ = 92246000.

The previous prime is 138416489. The next prime is 138416513. The reversal of 138416493 is 394614831.

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

It is a cyclic number.

It is not a de Polignac number, because 138416493 - 2² = 138416489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138416483) 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, 5563 + ... + 17543.

It is an arithmetic number, because the mean of its divisors is an integer number (23077332).

Almost surely, 2^138416493 is an apocalyptic number.

It is an amenable number.

138416493 is a deficient number, since it is larger than the sum of its proper divisors (46202163).

138416493 is a wasteful number, since it uses less digits than its factorization.

138416493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15835.

The product of its digits is 62208, while the sum is 39.

The square root of 138416493 is about 11765.0538885294. The cubic root of 138416493 is about 517.2842798530.

The spelling of 138416493 in words is "one hundred thirty-eight million, four hundred sixteen thousand, four hundred ninety-three".