188291 has 2 divisors, whose sum is σ = 188292. Its totient is φ = 188290.

The previous prime is 188281. The next prime is 188299. The reversal of 188291 is 192881.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188291 is a prime.

It is a Sophie Germain prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 188291.

It is not a weakly prime, because it can be changed into another prime (188299) 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 as a sum of consecutive naturals, namely, 94145 + 94146.

It is an arithmetic number, because the mean of its divisors is an integer number (94146).

2¹⁸⁸²⁹¹ is an apocalyptic number.

188291 is a deficient number, since it is larger than the sum of its proper divisors (1).

188291 is an equidigital number, since it uses as much as digits as its factorization.

188291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 29.

The square root of 188291 is about 433.9251087457. The cubic root of 188291 is about 57.3160853411.

The spelling of 188291 in words is "one hundred eighty-eight thousand, two hundred ninety-one".