867689 has 2 divisors, whose sum is σ = 867690. Its totient is φ = 867688.

The previous prime is 867679. The next prime is 867701. The reversal of 867689 is 986768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 153664 = 845^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 867689 - 2¹² = 863593 is a prime.

It is not a weakly prime, because it can be changed into another prime (867619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433844 + 433845.

It is an arithmetic number, because the mean of its divisors is an integer number (433845).

2⁸⁶⁷⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

867689 is a deficient number, since it is larger than the sum of its proper divisors (1).

867689 is an equidigital number, since it uses as much as digits as its factorization.

867689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 867689 is about 931.4982555002. The cubic root of 867689 is about 95.3794244120.

The spelling of 867689 in words is "eight hundred sixty-seven thousand, six hundred eighty-nine".