187994 has 4 divisors (see below), whose sum is σ = 281994. Its totient is φ = 93996.

The previous prime is 187987. The next prime is 188011. The reversal of 187994 is 499781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 105625 + 82369 = 325^2 + 287^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 187994.

It is an unprimeable number.

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, 46997 + ... + 47000.

2¹⁸⁷⁹⁹⁴ is an apocalyptic number.

187994 is a deficient number, since it is larger than the sum of its proper divisors (94000).

187994 is an equidigital number, since it uses as much as digits as its factorization.

187994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93999.

The product of its digits is 18144, while the sum is 38.

The square root of 187994 is about 433.5827487343. The cubic root of 187994 is about 57.2859337220.

The spelling of 187994 in words is "one hundred eighty-seven thousand, nine hundred ninety-four".