191956 has 12 divisors (see below), whose sum is σ = 345268. Its totient is φ = 93312.

The previous prime is 191953. The next prime is 191969. The reversal of 191956 is 659191.

191956 is nontrivially palindromic in base 6.

191956 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 184900 + 7056 = 430^2 + 84^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

191956 is an undulating number in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501 + ... + 796.

2¹⁹¹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

191956 is a deficient number, since it is larger than the sum of its proper divisors (153312).

191956 is a wasteful number, since it uses less digits than its factorization.

191956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 1336 counting only the distinct ones).

The product of its digits is 2430, while the sum is 31.

The square root of 191956 is about 438.1278352262. The cubic root of 191956 is about 57.6855756019.

The spelling of 191956 in words is "one hundred ninety-one thousand, nine hundred fifty-six".