191916 has 24 divisors (see below), whose sum is σ = 497840. Its totient is φ = 63936.

The previous prime is 191911. The next prime is 191929. The reversal of 191916 is 619191.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 191916.

It is not an unprimeable number, because it can be changed into a prime (191911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781 + ... + 996.

2¹⁹¹⁹¹⁶ is an apocalyptic number.

It is an amenable number.

191916 is an abundant number, since it is smaller than the sum of its proper divisors (305924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191916 is a wasteful number, since it uses less digits than its factorization.

191916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 1782 counting only the distinct ones).

The product of its digits is 486, while the sum is 27.

The square root of 191916 is about 438.0821840705. The cubic root of 191916 is about 57.6815684626.

The spelling of 191916 in words is "one hundred ninety-one thousand, nine hundred sixteen".