188999 has 2 divisors, whose sum is σ = 189000. Its totient is φ = 188998.

The previous prime is 188983. The next prime is 189011. The reversal of 188999 is 999881.

188999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 188999 - 2^{4} = 188983 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

188999 is a modest number, since divided by 999 gives 188 as remainder.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94499 + 94500.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2^{188999} is an apocalyptic number.

188999 is a deficient number, since it is larger than the sum of its proper divisors (1).

188999 is an equidigital number, since it uses as much as digits as its factorization.

188999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 44.

The square root of 188999 is about 434.7401522749. The cubic root of 188999 is about 57.3878342697.

The spelling of 188999 in words is "one hundred eighty-eight thousand, nine hundred ninety-nine".

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