869023489 has 2 divisors, whose sum is σ = 869023490. Its totient is φ = 869023488.

The previous prime is 869023487. The next prime is 869023511. The reversal of 869023489 is 984320968.

869023489 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 can be written as a sum of positive squares in only one way, i.e., 785849089 + 83174400 = 28033^2 + 9120^2 .

It is a cyclic number.

It is not a de Polignac number, because 869023489 - 2¹ = 869023487 is a prime.

Together with 869023487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (869023481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434511744 + 434511745.

It is an arithmetic number, because the mean of its divisors is an integer number (434511745).

Almost surely, 2^869023489 is an apocalyptic number.

It is an amenable number.

869023489 is a deficient number, since it is larger than the sum of its proper divisors (1).

869023489 is an equidigital number, since it uses as much as digits as its factorization.

869023489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 869023489 is about 29479.2043481502. The cubic root of 869023489 is about 954.2829660606.

The spelling of 869023489 in words is "eight hundred sixty-nine million, twenty-three thousand, four hundred eighty-nine".