73868639 has 8 divisors (see below), whose sum is σ = 80739120. Its totient is φ = 67167936.

The previous prime is 73868633. The next prime is 73868651. The reversal of 73868639 is 93686837.

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 73868639 - 2²⁰ = 72820063 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 (73868633) 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, 41534 + ... + 43275.

It is an arithmetic number, because the mean of its divisors is an integer number (10092390).

Almost surely, 2^73868639 is an apocalyptic number.

73868639 is a deficient number, since it is larger than the sum of its proper divisors (6870481).

73868639 is a wasteful number, since it uses less digits than its factorization.

73868639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84889.

The product of its digits is 1306368, while the sum is 50.

The square root of 73868639 is about 8594.6866725902. The cubic root of 73868639 is about 419.5850758641.

The spelling of 73868639 in words is "seventy-three million, eight hundred sixty-eight thousand, six hundred thirty-nine".