869959 has 2 divisors, whose sum is σ = 869960. Its totient is φ = 869958.

The previous prime is 869951. The next prime is 869983. The reversal of 869959 is 959968.

It is a happy number.

869959 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 869959 - 2³ = 869951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434979 + 434980.

It is an arithmetic number, because the mean of its divisors is an integer number (434980).

2⁸⁶⁹⁹⁵⁹ is an apocalyptic number.

869959 is a deficient number, since it is larger than the sum of its proper divisors (1).

869959 is an equidigital number, since it uses as much as digits as its factorization.

869959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 46.

The square root of 869959 is about 932.7159267430. The cubic root of 869959 is about 95.4625274436.

Subtracting 869959 from its reverse (959968), we obtain a palindrome (90009).

The spelling of 869959 in words is "eight hundred sixty-nine thousand, nine hundred fifty-nine".