191053967 has 4 divisors (see below), whose sum is σ = 205750440. Its totient is φ = 176357496.

The previous prime is 191053963. The next prime is 191053969. The reversal of 191053967 is 769350191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 191053967 - 2² = 191053963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191053963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7348217 + ... + 7348242.

It is an arithmetic number, because the mean of its divisors is an integer number (51437610).

Almost surely, 2^191053967 is an apocalyptic number.

191053967 is a deficient number, since it is larger than the sum of its proper divisors (14696473).

191053967 is a wasteful number, since it uses less digits than its factorization.

191053967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14696472.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 191053967 is about 13822.2272807243. The cubic root of 191053967 is about 575.9507567454.

The spelling of 191053967 in words is "one hundred ninety-one million, fifty-three thousand, nine hundred sixty-seven".