138305417 has 8 divisors (see below), whose sum is σ = 145360320. Its totient is φ = 131337360.

The previous prime is 138305411. The next prime is 138305441. The reversal of 138305417 is 714503831.

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

It is not a de Polignac number, because 138305417 - 2²⁴ = 121528201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138305411) 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, 18434 + ... + 24827.

It is an arithmetic number, because the mean of its divisors is an integer number (18170040).

Almost surely, 2^138305417 is an apocalyptic number.

It is an amenable number.

138305417 is a deficient number, since it is larger than the sum of its proper divisors (7054903).

138305417 is a wasteful number, since it uses less digits than its factorization.

138305417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43423.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 138305417 is about 11760.3323507459. The cubic root of 138305417 is about 517.1458733096.

The spelling of 138305417 in words is "one hundred thirty-eight million, three hundred five thousand, four hundred seventeen".