899223643922 has 18 divisors (see below), whose sum is σ = 1432882307253. Its totient is φ = 423153339232.

The previous prime is 899223643883. The next prime is 899223643931. The reversal of 899223643922 is 229346322998.

It can be written as a sum of positive squares in 2 ways, for example, as 822991881721 + 76231762201 = 907189^2 + 276101^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=670531.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22778333 + ... + 22817775.

Almost surely, 2^899223643922 is an apocalyptic number.

899223643922 is a deficient number, since it is larger than the sum of its proper divisors (533658663331).

899223643922 is an frugal number, since it uses more digits than its factorization.

899223643922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78922 (or 39462 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 59.

The spelling of 899223643922 in words is "eight hundred ninety-nine billion, two hundred twenty-three million, six hundred forty-three thousand, nine hundred twenty-two".