138465493 has 8 divisors (see below), whose sum is σ = 146776320. Its totient is φ = 130173120.

The previous prime is 138465479. The next prime is 138465511. The reversal of 138465493 is 394564831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138465493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138465443) 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, 12738 + ... + 20956.

It is an arithmetic number, because the mean of its divisors is an integer number (18347040).

Almost surely, 2^138465493 is an apocalyptic number.

It is an amenable number.

138465493 is a deficient number, since it is larger than the sum of its proper divisors (8310827).

138465493 is an equidigital number, since it uses as much as digits as its factorization.

138465493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9227.

The product of its digits is 311040, while the sum is 43.

The square root of 138465493 is about 11767.1361426645. The cubic root of 138465493 is about 517.3453128961.

The spelling of 138465493 in words is "one hundred thirty-eight million, four hundred sixty-five thousand, four hundred ninety-three".