869798723922 has 18 divisors (see below), whose sum is σ = 1884572474967. Its totient is φ = 289931589036.

The previous prime is 869798723879. The next prime is 869798723939. The reversal of 869798723922 is 229327897968.

869798723922 is a `hidden beast` number, since 86 + 9 + 7 + 98 + 72 + 392 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 434899361961 + 434899361961 = 659469^2 + 659469^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=659469.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3846903 + ... + 4066725.

Almost surely, 2^869798723922 is an apocalyptic number.

869798723922 is an abundant number, since it is smaller than the sum of its proper divisors (1014773751045).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

869798723922 is an frugal number, since it uses more digits than its factorization.

869798723922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439654 (or 219828 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 72.

Multiplying 869798723922 by its sum of digits (72), we get a square (62625508122384 = 7913628²).

The spelling of 869798723922 in words is "eight hundred sixty-nine billion, seven hundred ninety-eight million, seven hundred twenty-three thousand, nine hundred twenty-two".