191047969 has 8 divisors (see below), whose sum is σ = 225869760. Its totient is φ = 158108496.

The previous prime is 191047957. The next prime is 191047993. The reversal of 191047969 is 969740191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 191047969 - 2¹³ = 191039777 is a prime.

It is a super-2 number, since 2×191047969² = 72998652918049922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191047919) 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, 470359 + ... + 470764.

It is an arithmetic number, because the mean of its divisors is an integer number (28233720).

Almost surely, 2^191047969 is an apocalyptic number.

It is an amenable number.

191047969 is a deficient number, since it is larger than the sum of its proper divisors (34821791).

191047969 is an equidigital number, since it uses as much as digits as its factorization.

191047969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941159.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 191047969 is about 13822.0103096474. The cubic root of 191047969 is about 575.9447294976.

The spelling of 191047969 in words is "one hundred ninety-one million, forty-seven thousand, nine hundred sixty-nine".