869569397 has 8 divisors (see below), whose sum is σ = 921021912. Its totient is φ = 818150400.

The previous prime is 869569387. The next prime is 869569403. The reversal of 869569397 is 793965968.

It can be written as a sum of positive squares in 4 ways, for example, as 189090001 + 680479396 = 13751^2 + 26086^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869569397 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 (869569387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61997 + ... + 74717.

It is an arithmetic number, because the mean of its divisors is an integer number (115127739).

Almost surely, 2^869569397 is an apocalyptic number.

It is an amenable number.

869569397 is a deficient number, since it is larger than the sum of its proper divisors (51452515).

869569397 is a wasteful number, since it uses less digits than its factorization.

869569397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16759.

The product of its digits is 22044960, while the sum is 62.

The square root of 869569397 is about 29488.4620996077. The cubic root of 869569397 is about 954.4827464906.

The spelling of 869569397 in words is "eight hundred sixty-nine million, five hundred sixty-nine thousand, three hundred ninety-seven".