869846819 has 4 divisors (see below), whose sum is σ = 869989560. Its totient is φ = 869704080.

The previous prime is 869846807. The next prime is 869846833. The reversal of 869846819 is 918648968.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869846819 is a prime.

It is a super-2 number, since 2×869846819² = 1513266977048837522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869846899) 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 3 ways as a sum of consecutive naturals, for example, 61802 + ... + 74559.

It is an arithmetic number, because the mean of its divisors is an integer number (217497390).

Almost surely, 2^869846819 is an apocalyptic number.

869846819 is a deficient number, since it is larger than the sum of its proper divisors (142741).

869846819 is a wasteful number, since it uses less digits than its factorization.

869846819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142740.

The product of its digits is 5971968, while the sum is 59.

The square root of 869846819 is about 29493.1656320579. The cubic root of 869846819 is about 954.5842397733.

The spelling of 869846819 in words is "eight hundred sixty-nine million, eight hundred forty-six thousand, eight hundred nineteen".