899880005 has 8 divisors (see below), whose sum is σ = 1117092600. Its totient is φ = 695079616.

The previous prime is 899879999. The next prime is 899880017. The reversal of 899880005 is 500088998.

It is a happy number.

It is a Cunningham number, because it is equal to 29998²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 899880004 = 1^2 + 29998^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 899880005 - 2¹⁰ = 899878981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3102890 + ... + 3103179.

It is an arithmetic number, because the mean of its divisors is an integer number (139636575).

Almost surely, 2^899880005 is an apocalyptic number.

It is an amenable number.

899880005 is a deficient number, since it is larger than the sum of its proper divisors (217212595).

899880005 is a wasteful number, since it uses less digits than its factorization.

899880005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6206103.

The product of its (nonzero) digits is 207360, while the sum is 47.

The square root of 899880005 is about 29998.0000166678. Note that the first 4 decimals coincide. The cubic root of 899880005 is about 965.4464738471.

The spelling of 899880005 in words is "eight hundred ninety-nine million, eight hundred eighty thousand, five".