868487 has 2 divisors, whose sum is σ = 868488. Its totient is φ = 868486.

The previous prime is 868459. The next prime is 868489. The reversal of 868487 is 784868.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868487 - 2⁶ = 868423 is a prime.

Together with 868489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434243 + 434244.

It is an arithmetic number, because the mean of its divisors is an integer number (434244).

2⁸⁶⁸⁴⁸⁷ is an apocalyptic number.

868487 is a deficient number, since it is larger than the sum of its proper divisors (1).

868487 is an equidigital number, since it uses as much as digits as its factorization.

868487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 41.

The square root of 868487 is about 931.9264992477. The cubic root of 868487 is about 95.4086551077.

The spelling of 868487 in words is "eight hundred sixty-eight thousand, four hundred eighty-seven".