899279789 has 4 divisors (see below), whose sum is σ = 899495100. Its totient is φ = 899064480.

The previous prime is 899279743. The next prime is 899279819. The reversal of 899279789 is 987972998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987972998 = 2 ⋅493986499.

It can be written as a sum of positive squares in 2 ways, for example, as 495952900 + 403326889 = 22270^2 + 20083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899279789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899279089) 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 3 ways as a sum of consecutive naturals, for example, 101264 + ... + 109785.

It is an arithmetic number, because the mean of its divisors is an integer number (224873775).

Almost surely, 2^899279789 is an apocalyptic number.

It is an amenable number.

899279789 is a deficient number, since it is larger than the sum of its proper divisors (215311).

899279789 is a wasteful number, since it uses less digits than its factorization.

899279789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215310.

The product of its digits is 41150592, while the sum is 68.

The square root of 899279789 is about 29987.9940809651. The cubic root of 899279789 is about 965.2317765907.

The spelling of 899279789 in words is "eight hundred ninety-nine million, two hundred seventy-nine thousand, seven hundred eighty-nine".