987797 has 2 divisors, whose sum is σ = 987798. Its totient is φ = 987796.

The previous prime is 987793. The next prime is 987803. The reversal of 987797 is 797789.

987797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 857476 + 130321 = 926^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 987797 - 2² = 987793 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 (987793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493898 + 493899.

It is an arithmetic number, because the mean of its divisors is an integer number (493899).

2⁹⁸⁷⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

987797 is a deficient number, since it is larger than the sum of its proper divisors (1).

987797 is an equidigital number, since it uses as much as digits as its factorization.

987797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 47.

The square root of 987797 is about 993.8797714009. The cubic root of 987797 is about 99.5915674328.

The spelling of 987797 in words is "nine hundred eighty-seven thousand, seven hundred ninety-seven".