864868469 has 4 divisors (see below), whose sum is σ = 881186796. Its totient is φ = 848550144.

The previous prime is 864868423. The next prime is 864868483. The reversal of 864868469 is 964868468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222904900 + 641963569 = 14930^2 + 25337^2 .

It is a cyclic number.

It is not a de Polignac number, because 864868469 - 2²⁰ = 863819893 is a prime.

It is a super-2 number, since 2×864868469² = 1495994937340807922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864868409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8159084 + ... + 8159189.

It is an arithmetic number, because the mean of its divisors is an integer number (220296699).

Almost surely, 2^864868469 is an apocalyptic number.

It is an amenable number.

864868469 is a deficient number, since it is larger than the sum of its proper divisors (16318327).

864868469 is a wasteful number, since it uses less digits than its factorization.

864868469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16318326.

The product of its digits is 15925248, while the sum is 59.

The square root of 864868469 is about 29408.6461606107. The cubic root of 864868469 is about 952.7596466783.

Subtracting 864868469 from its reverse (964868468), we obtain a palindrome (99999999).

The spelling of 864868469 in words is "eight hundred sixty-four million, eight hundred sixty-eight thousand, four hundred sixty-nine".