191682137 has 4 divisors (see below), whose sum is σ = 192394980. Its totient is φ = 190969296.

The previous prime is 191682133. The next prime is 191682151. The reversal of 191682137 is 731286191.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17547721 + 174134416 = 4189^2 + 13196^2 .

It is a cyclic number.

It is not a de Polignac number, because 191682137 - 2² = 191682133 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 191682137.

It is not an unprimeable number, because it can be changed into a prime (191682133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356018 + ... + 356555.

It is an arithmetic number, because the mean of its divisors is an integer number (48098745).

Almost surely, 2^191682137 is an apocalyptic number.

It is an amenable number.

191682137 is a deficient number, since it is larger than the sum of its proper divisors (712843).

191682137 is an equidigital number, since it uses as much as digits as its factorization.

191682137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712842.

The product of its digits is 18144, while the sum is 38.

The square root of 191682137 is about 13844.9318163724. The cubic root of 191682137 is about 576.5812927098.

The spelling of 191682137 in words is "one hundred ninety-one million, six hundred eighty-two thousand, one hundred thirty-seven".