869489 has 2 divisors, whose sum is σ = 869490. Its totient is φ = 869488.

The previous prime is 869471. The next prime is 869501. The reversal of 869489 is 984968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478864 + 390625 = 692^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 869489 - 2⁸ = 869233 is a prime.

It is a super-2 number, since 2×869489² = 1512022242242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (869419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434744 + 434745.

It is an arithmetic number, because the mean of its divisors is an integer number (434745).

2⁸⁶⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

869489 is a deficient number, since it is larger than the sum of its proper divisors (1).

869489 is an equidigital number, since it uses as much as digits as its factorization.

869489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 869489 is about 932.4639403216. The cubic root of 869489 is about 95.4453329665.

The spelling of 869489 in words is "eight hundred sixty-nine thousand, four hundred eighty-nine".