191275985 has 8 divisors (see below), whose sum is σ = 232437120. Its totient is φ = 151083504.

The previous prime is 191275969. The next prime is 191276011. The reversal of 191275985 is 589572191.

It is a happy number.

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 191275985 - 2⁴ = 191275969 is a prime.

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, 241727 + ... + 242516.

It is an arithmetic number, because the mean of its divisors is an integer number (29054640).

Almost surely, 2^191275985 is an apocalyptic number.

It is an amenable number.

191275985 is a deficient number, since it is larger than the sum of its proper divisors (41161135).

191275985 is an equidigital number, since it uses as much as digits as its factorization.

191275985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484327.

The product of its digits is 226800, while the sum is 47.

The square root of 191275985 is about 13830.2561436873. The cubic root of 191275985 is about 576.1737686640.

The spelling of 191275985 in words is "one hundred ninety-one million, two hundred seventy-five thousand, nine hundred eighty-five".