899874947809 has 4 divisors (see below), whose sum is σ = 899881170480. Its totient is φ = 899868725140.

The previous prime is 899874947771. The next prime is 899874947827. The reversal of 899874947809 is 908749478998.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 899874947809 - 2⁷ = 899874947681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (899874947879) 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, 2889127 + ... + 3185404.

It is an arithmetic number, because the mean of its divisors is an integer number (224970292620).

Almost surely, 2^899874947809 is an apocalyptic number.

It is an amenable number.

899874947809 is a deficient number, since it is larger than the sum of its proper divisors (6222671).

899874947809 is a wasteful number, since it uses less digits than its factorization.

899874947809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222670.

The product of its (nonzero) digits is 2633637888, while the sum is 82.

The spelling of 899874947809 in words is "eight hundred ninety-nine billion, eight hundred seventy-four million, nine hundred forty-seven thousand, eight hundred nine".