68919 has 4 divisors (see below), whose sum is σ = 91896. Its totient is φ = 45944.

The previous prime is 68917. The next prime is 68927. The reversal of 68919 is 91986.

It is a happy number.

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 68919 - 2¹ = 68917 is a prime.

It is a super-2 number, since 2×68919² = 9499657122, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 68919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11484 + ... + 11489.

It is an arithmetic number, because the mean of its divisors is an integer number (22974).

2⁶⁸⁹¹⁹ is an apocalyptic number.

68919 is a deficient number, since it is larger than the sum of its proper divisors (22977).

68919 is a wasteful number, since it uses less digits than its factorization.

68919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22976.

The product of its digits is 3888, while the sum is 33.

The square root of 68919 is about 262.5242845910. The cubic root of 68919 is about 40.9996034068. Note that the first 3 decimals are identical.

Subtracting from 68919 its sum of digits (33), we obtain a palindrome (68886).

The spelling of 68919 in words is "sixty-eight thousand, nine hundred nineteen".