868787 has 2 divisors, whose sum is σ = 868788. Its totient is φ = 868786.

The previous prime is 868783. The next prime is 868793. The reversal of 868787 is 787868.

It is a happy number.

868787 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 is a cyclic number.

It is not a de Polignac number, because 868787 - 2² = 868783 is a prime.

It is a Chen prime.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868787.

It is not a weakly prime, because it can be changed into another prime (868783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434393 + 434394.

It is an arithmetic number, because the mean of its divisors is an integer number (434394).

2⁸⁶⁸⁷⁸⁷ is an apocalyptic number.

868787 is a deficient number, since it is larger than the sum of its proper divisors (1).

868787 is an equidigital number, since it uses as much as digits as its factorization.

868787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 44.

The square root of 868787 is about 932.0874422499. The cubic root of 868787 is about 95.4196394600.

The spelling of 868787 in words is "eight hundred sixty-eight thousand, seven hundred eighty-seven".