123297821289 has 24 divisors (see below), whose sum is σ = 189949617000. Its totient is φ = 76798629888.

The previous prime is 123297821281. The next prime is 123297821303. The reversal of 123297821289 is 982128792321.

123297821289 is a `hidden beast` number, since 12 + 329 + 7 + 8 + 21 + 289 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 48899803689 + 74398017600 = 221133^2 + 272760^2 .

It is not a de Polignac number, because 123297821289 - 2³ = 123297821281 is a prime.

It is a super-2 number, since 2×123297821289² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123297821281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2920164 + ... + 2962085.

It is an arithmetic number, because the mean of its divisors is an integer number (7914567375).

Almost surely, 2^123297821289 is an apocalyptic number.

It is an amenable number.

123297821289 is a deficient number, since it is larger than the sum of its proper divisors (66651795711).

123297821289 is a wasteful number, since it uses less digits than its factorization.

123297821289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882409 (or 5882406 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The spelling of 123297821289 in words is "one hundred twenty-three billion, two hundred ninety-seven million, eight hundred twenty-one thousand, two hundred eighty-nine".