68831719 has 4 divisors (see below), whose sum is σ = 75089160. Its totient is φ = 62574280.

The previous prime is 68831717. The next prime is 68831747. The reversal of 68831719 is 91713886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68831719 - 2¹ = 68831717 is a prime.

It is a super-3 number, since 3×68831719³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68831717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3128704 + ... + 3128725.

It is an arithmetic number, because the mean of its divisors is an integer number (18772290).

Almost surely, 2^68831719 is an apocalyptic number.

68831719 is a deficient number, since it is larger than the sum of its proper divisors (6257441).

68831719 is a wasteful number, since it uses less digits than its factorization.

68831719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257440.

The product of its digits is 72576, while the sum is 43.

The square root of 68831719 is about 8296.4883535144. The cubic root of 68831719 is about 409.8228840380.

The spelling of 68831719 in words is "sixty-eight million, eight hundred thirty-one thousand, seven hundred nineteen".