97787 has 2 divisors, whose sum is σ = 97788. Its totient is φ = 97786.

The previous prime is 97777. The next prime is 97789. The reversal of 97787 is 78779.

It is a strong prime.

It is an emirp because it is prime and its reverse (78779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97787 - 2⁴ = 97771 is a prime.

Together with 97789, 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 97787.

It is not a weakly prime, because it can be changed into another prime (97789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48893 + 48894.

It is an arithmetic number, because the mean of its divisors is an integer number (48894).

2⁹⁷⁷⁸⁷ is an apocalyptic number.

97787 is a deficient number, since it is larger than the sum of its proper divisors (1).

97787 is an equidigital number, since it uses as much as digits as its factorization.

97787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 97787 is about 312.7091300234. The cubic root of 97787 is about 46.0709365513.

The spelling of 97787 in words is "ninety-seven thousand, seven hundred eighty-seven".