196687 has 2 divisors, whose sum is σ = 196688. Its totient is φ = 196686.

The previous prime is 196681. The next prime is 196699. The reversal of 196687 is 786691.

It is a weak prime.

It is an emirp because it is prime and its reverse (786691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196687 is a prime.

It is a Chen prime.

196687 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98343 + 98344.

It is an arithmetic number, because the mean of its divisors is an integer number (98344).

196687 is a Friedman number, since it can be written as 79+8^(6-1)*6, using all its digits and the basic arithmetic operations.

2¹⁹⁶⁶⁸⁷ is an apocalyptic number.

196687 is a deficient number, since it is larger than the sum of its proper divisors (1).

196687 is an equidigital number, since it uses as much as digits as its factorization.

196687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 196687 is about 443.4940811330. The cubic root of 196687 is about 58.1556461507.

The spelling of 196687 in words is "one hundred ninety-six thousand, six hundred eighty-seven".