97987 has 2 divisors, whose sum is σ = 97988. Its totient is φ = 97986.

The previous prime is 97973. The next prime is 98009. The reversal of 97987 is 78979.

It is a weak prime.

It is an emirp because it is prime and its reverse (78979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97987 - 2⁷ = 97859 is a prime.

97987 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (97927) 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, 48993 + 48994.

It is an arithmetic number, because the mean of its divisors is an integer number (48994).

2⁹⁷⁹⁸⁷ is an apocalyptic number.

97987 is a deficient number, since it is larger than the sum of its proper divisors (1).

97987 is an equidigital number, since it uses as much as digits as its factorization.

97987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 97987 is about 313.0287526730. The cubic root of 97987 is about 46.1023242021.

It can be divided in two parts, 9798 and 7, that multiplied together give a palindrome (68586).

The spelling of 97987 in words is "ninety-seven thousand, nine hundred eighty-seven".