191378968 has 32 divisors (see below), whose sum is σ = 392117760. Its totient is φ = 86843680.

The previous prime is 191378927. The next prime is 191378987. The reversal of 191378968 is 869873191.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63921 + ... + 66847.

It is an arithmetic number, because the mean of its divisors is an integer number (12253680).

Almost surely, 2^191378968 is an apocalyptic number.

It is an amenable number.

191378968 is an abundant number, since it is smaller than the sum of its proper divisors (200738792).

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

191378968 is a wasteful number, since it uses less digits than its factorization.

191378968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687 (or 3683 counting only the distinct ones).

The product of its digits is 653184, while the sum is 52.

The square root of 191378968 is about 13833.9787479958. The cubic root of 191378968 is about 576.2771541074.

The spelling of 191378968 in words is "one hundred ninety-one million, three hundred seventy-eight thousand, nine hundred sixty-eight".