867679 has 2 divisors, whose sum is σ = 867680. Its totient is φ = 867678.

The previous prime is 867677. The next prime is 867689. The reversal of 867679 is 976768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 867679 - 2¹ = 867677 is a prime.

Together with 867677, it forms a pair of twin primes.

867679 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (867677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433839 + 433840.

It is an arithmetic number, because the mean of its divisors is an integer number (433840).

2⁸⁶⁷⁶⁷⁹ is an apocalyptic number.

867679 is a deficient number, since it is larger than the sum of its proper divisors (1).

867679 is an equidigital number, since it uses as much as digits as its factorization.

867679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 867679 is about 931.4928877882. The cubic root of 867679 is about 95.3790579989.

The spelling of 867679 in words is "eight hundred sixty-seven thousand, six hundred seventy-nine".