191797873 has 8 divisors (see below), whose sum is σ = 193026848. Its totient is φ = 190573344.

The previous prime is 191797841. The next prime is 191797891. The reversal of 191797873 is 378797191.

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 191797873 - 2⁵ = 191797841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191797873.

It is not an unprimeable number, because it can be changed into a prime (191717873) 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, 128590 + ... + 130072.

It is an arithmetic number, because the mean of its divisors is an integer number (24128356).

Almost surely, 2^191797873 is an apocalyptic number.

It is an amenable number.

191797873 is a deficient number, since it is larger than the sum of its proper divisors (1228975).

191797873 is a wasteful number, since it uses less digits than its factorization.

191797873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223.

The product of its digits is 666792, while the sum is 52.

The square root of 191797873 is about 13849.1109100909. The cubic root of 191797873 is about 576.6973142781.

The spelling of 191797873 in words is "one hundred ninety-one million, seven hundred ninety-seven thousand, eight hundred seventy-three".