8191967 has 12 divisors (see below), whose sum is σ = 9838656. Its totient is φ = 6793920.

The previous prime is 8191921. The next prime is 8191969. The reversal of 8191967 is 7691918.

It is a happy number.

8191967 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8191967 - 2⁶ = 8191903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8191969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178 + ... + 4215.

It is an arithmetic number, because the mean of its divisors is an integer number (819888).

Almost surely, 2^8191967 is an apocalyptic number.

8191967 is a deficient number, since it is larger than the sum of its proper divisors (1646689).

8191967 is a wasteful number, since it uses less digits than its factorization.

8191967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5438 (or 5431 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 8191967 is about 2862.1612463312. The cubic root of 8191967 is about 201.5870972967.

The spelling of 8191967 in words is "eight million, one hundred ninety-one thousand, nine hundred sixty-seven".