199487 has 2 divisors, whose sum is σ = 199488. Its totient is φ = 199486.

The previous prime is 199483. The next prime is 199489. The reversal of 199487 is 784991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199487 - 2² = 199483 is a prime.

Together with 199489, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199483) 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, 99743 + 99744.

It is an arithmetic number, because the mean of its divisors is an integer number (99744).

2¹⁹⁹⁴⁸⁷ is an apocalyptic number.

199487 is a deficient number, since it is larger than the sum of its proper divisors (1).

199487 is an equidigital number, since it uses as much as digits as its factorization.

199487 is an odious number, because the sum of its binary digits is odd.

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

The square root of 199487 is about 446.6396758014. The cubic root of 199487 is about 58.4303112493.

It can be divided in two parts, 199 and 487, that added together give a palindrome (686).

The spelling of 199487 in words is "one hundred ninety-nine thousand, four hundred eighty-seven".