868997 has 2 divisors, whose sum is σ = 868998. Its totient is φ = 868996.

The previous prime is 868993. The next prime is 868999. The reversal of 868997 is 799868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 556516 + 312481 = 746^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 868997 - 2² = 868993 is a prime.

Together with 868999, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434498 + 434499.

It is an arithmetic number, because the mean of its divisors is an integer number (434499).

2⁸⁶⁸⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

868997 is a deficient number, since it is larger than the sum of its proper divisors (1).

868997 is an equidigital number, since it uses as much as digits as its factorization.

868997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 868997 is about 932.2000858185. The cubic root of 868997 is about 95.4273270021.

The spelling of 868997 in words is "eight hundred sixty-eight thousand, nine hundred ninety-seven".