191964685 has 48 divisors (see below), whose sum is σ = 266289408. Its totient is φ = 132612480.

The previous prime is 191964673. The next prime is 191964719. The reversal of 191964685 is 586469191.

It is not a de Polignac number, because 191964685 - 2⁷ = 191964557 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1222627 + ... + 1222783.

It is an arithmetic number, because the mean of its divisors is an integer number (5547696).

Almost surely, 2^191964685 is an apocalyptic number.

It is an amenable number.

191964685 is a deficient number, since it is larger than the sum of its proper divisors (74324723).

191964685 is a wasteful number, since it uses less digits than its factorization.

191964685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 263 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The square root of 191964685 is about 13855.1320816512. The cubic root of 191964685 is about 576.8644557850.

The spelling of 191964685 in words is "one hundred ninety-one million, nine hundred sixty-four thousand, six hundred eighty-five".