869009573 has 4 divisors (see below), whose sum is σ = 871804128. Its totient is φ = 866215020.

The previous prime is 869009567. The next prime is 869009671. The reversal of 869009573 is 375900968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 869009573 - 2⁶ = 869009509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869009543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1396811 + ... + 1397432.

It is an arithmetic number, because the mean of its divisors is an integer number (217951032).

Almost surely, 2^869009573 is an apocalyptic number.

It is an amenable number.

869009573 is a deficient number, since it is larger than the sum of its proper divisors (2794555).

869009573 is a wasteful number, since it uses less digits than its factorization.

869009573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794554.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 869009573 is about 29478.9683164116. The cubic root of 869009573 is about 954.2778722694.

The spelling of 869009573 in words is "eight hundred sixty-nine million, nine thousand, five hundred seventy-three".