869086919 has 4 divisors (see below), whose sum is σ = 872391696. Its totient is φ = 865782144.

The previous prime is 869086879. The next prime is 869086943. The reversal of 869086919 is 919680968.

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

It is a cyclic number.

It is not a de Polignac number, because 869086919 - 2¹⁶ = 869021383 is a prime.

It is a super-2 number, since 2×869086919² = 1510624145553825122, 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 (869086319) 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, 1651994 + ... + 1652519.

It is an arithmetic number, because the mean of its divisors is an integer number (218097924).

Almost surely, 2^869086919 is an apocalyptic number.

869086919 is a deficient number, since it is larger than the sum of its proper divisors (3304777).

869086919 is a wasteful number, since it uses less digits than its factorization.

869086919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304776.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 869086919 is about 29480.2801716673. The cubic root of 869086919 is about 954.3061831913.

The spelling of 869086919 in words is "eight hundred sixty-nine million, eighty-six thousand, nine hundred nineteen".