899808669 has 40 divisors (see below), whose sum is σ = 1447915040. Its totient is φ = 555043104.

The previous prime is 899808667. The next prime is 899808671. The reversal of 899808669 is 966808998.

It is an interprime number because it is at equal distance from previous prime (899808667) and next prime (899808671).

It is not a de Polignac number, because 899808669 - 2¹ = 899808667 is a prime.

It is a super-2 number, since 2×899808669² = 1619311281615103122, 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 (899808667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 59379 + ... + 72975.

It is an arithmetic number, because the mean of its divisors is an integer number (36197876).

Almost surely, 2^899808669 is an apocalyptic number.

It is an amenable number.

899808669 is a deficient number, since it is larger than the sum of its proper divisors (548106371).

899808669 is a wasteful number, since it uses less digits than its factorization.

899808669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13671 (or 13662 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 63.

The square root of 899808669 is about 29996.8109805026. The cubic root of 899808669 is about 965.4209619607.

The spelling of 899808669 in words is "eight hundred ninety-nine million, eight hundred eight thousand, six hundred sixty-nine".