188997 has 8 divisors (see below), whose sum is σ = 255744. Its totient is φ = 124128.

The previous prime is 188983. The next prime is 188999. The reversal of 188997 is 799881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 188997 - 2⁶ = 188933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (31968).

2¹⁸⁸⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

188997 is a deficient number, since it is larger than the sum of its proper divisors (66747).

188997 is an equidigital number, since it uses as much as digits as its factorization.

188997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its digits is 36288, while the sum is 42.

The square root of 188997 is about 434.7378520442. The cubic root of 188997 is about 57.3876318417.

The spelling of 188997 in words is "one hundred eighty-eight thousand, nine hundred ninety-seven".