819916 has 6 divisors (see below), whose sum is σ = 1434860. Its totient is φ = 409956.

The previous prime is 819913. The next prime is 819937. The reversal of 819916 is 619918.

It is not an unprimeable number, because it can be changed into a prime (819911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102486 + ... + 102493.

2⁸¹⁹⁹¹⁶ is an apocalyptic number.

It is an amenable number.

819916 is a deficient number, since it is larger than the sum of its proper divisors (614944).

819916 is a wasteful number, since it uses less digits than its factorization.

819916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204983 (or 204981 counting only the distinct ones).

The product of its digits is 3888, while the sum is 34.

The square root of 819916 is about 905.4921313849. The cubic root of 819916 is about 93.5958200583.

The spelling of 819916 in words is "eight hundred nineteen thousand, nine hundred sixteen".