869247289 has 3 divisors (see below), whose sum is σ = 869276773.
Its totient is φ = 869217806.
The previous prime is 869247263. The next prime is 869247293. The reversal of 869247289 is 982742968.
The square root of 869247289 is 29483.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is a de Polignac number, because none of the positive numbers 2k-869247289 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (869247209) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14742 + ... + 44224.
Almost surely, 2869247289 is an apocalyptic number.
869247289 is the 29483-rd square number.
869247289 is the 14742-nd centered octagonal number.
It is an amenable number.
869247289 is a deficient number, since it is larger than the sum of its proper divisors (29484).
869247289 is an frugal number, since it uses more digits than its factorization.
869247289 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 58966 (or 29483 counting only the distinct ones).
The product of its digits is 3483648, while the sum is 55.
The cubic root of 869247289 is about 954.3648779996.
The spelling of 869247289 in words is "eight hundred sixty-nine million, two hundred forty-seven thousand, two hundred eighty-nine".