68816919 has 8 divisors (see below), whose sum is σ = 91821952. Its totient is φ = 45844920.

The previous prime is 68816903. The next prime is 68816933. The reversal of 68816919 is 91961886.

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

It is not a de Polignac number, because 68816919 - 2⁴ = 68816903 is a prime.

It is a super-2 number, since 2×68816919² = 9471536681305122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68816999) 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, 2899 + ... + 12084.

It is an arithmetic number, because the mean of its divisors is an integer number (11477744).

Almost surely, 2^68816919 is an apocalyptic number.

68816919 is a deficient number, since it is larger than the sum of its proper divisors (23005033).

68816919 is a wasteful number, since it uses less digits than its factorization.

68816919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16517.

The product of its digits is 186624, while the sum is 48.

The square root of 68816919 is about 8295.5963619260. The cubic root of 68816919 is about 409.7935089498.

The spelling of 68816919 in words is "sixty-eight million, eight hundred sixteen thousand, nine hundred nineteen".