68190919 has 8 divisors (see below), whose sum is σ = 70704000. Its totient is φ = 65688672.

The previous prime is 68190907. The next prime is 68190923. The reversal of 68190919 is 91909186.

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 68190919 - 2⁹ = 68190407 is a prime.

It is a super-2 number, since 2×68190919² = 9300002868129122, 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 (68190949) 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, 11437 + ... + 16345.

It is an arithmetic number, because the mean of its divisors is an integer number (8838000).

Almost surely, 2^68190919 is an apocalyptic number.

68190919 is a deficient number, since it is larger than the sum of its proper divisors (2513081).

68190919 is a wasteful number, since it uses less digits than its factorization.

68190919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5417.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 68190919 is about 8257.7793019673. The cubic root of 68190919 is about 408.5471461470.

The spelling of 68190919 in words is "sixty-eight million, one hundred ninety thousand, nine hundred nineteen".