68123817 has 6 divisors (see below), whose sum is σ = 98401082. Its totient is φ = 45415872.

The previous prime is 68123773. The next prime is 68123831. The reversal of 68123817 is 71832186.

It can be written as a sum of positive squares in only one way, i.e., 66194496 + 1929321 = 8136^2 + 1389^2 .

It is not a de Polignac number, because 68123817 - 2¹¹ = 68121769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68123857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3784648 + ... + 3784665.

Almost surely, 2^68123817 is an apocalyptic number.

It is an amenable number.

68123817 is a deficient number, since it is larger than the sum of its proper divisors (30277265).

68123817 is a wasteful number, since it uses less digits than its factorization.

68123817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7569319 (or 7569316 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 68123817 is about 8253.7153452248. The cubic root of 68123817 is about 408.4130944380.

The spelling of 68123817 in words is "sixty-eight million, one hundred twenty-three thousand, eight hundred seventeen".