869728269 has 4 divisors (see below), whose sum is σ = 1159637696. Its totient is φ = 579818844.

The previous prime is 869728267. The next prime is 869728283. The reversal of 869728269 is 962827968.

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 not a de Polignac number, because 869728269 - 2¹ = 869728267 is a prime.

It is a super-2 number, since 2×869728269² = 1512854523795472722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869728267) 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, 144954709 + ... + 144954714.

It is an arithmetic number, because the mean of its divisors is an integer number (289909424).

Almost surely, 2^869728269 is an apocalyptic number.

It is an amenable number.

869728269 is a deficient number, since it is larger than the sum of its proper divisors (289909427).

869728269 is a wasteful number, since it uses less digits than its factorization.

869728269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289909426.

The product of its digits is 5225472, while the sum is 57.

The square root of 869728269 is about 29491.1557759271. The cubic root of 869728269 is about 954.5408715616.

The spelling of 869728269 in words is "eight hundred sixty-nine million, seven hundred twenty-eight thousand, two hundred sixty-nine".