197887 has 2 divisors, whose sum is σ = 197888. Its totient is φ = 197886.

The previous prime is 197837. The next prime is 197891. The reversal of 197887 is 788791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197887 - 2⁷ = 197759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197807) 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, 98943 + 98944.

It is an arithmetic number, because the mean of its divisors is an integer number (98944).

2¹⁹⁷⁸⁸⁷ is an apocalyptic number.

197887 is a deficient number, since it is larger than the sum of its proper divisors (1).

197887 is an equidigital number, since it uses as much as digits as its factorization.

197887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 40.

The square root of 197887 is about 444.8449167969. The cubic root of 197887 is about 58.2736768797.

The spelling of 197887 in words is "one hundred ninety-seven thousand, eight hundred eighty-seven".