123020084409 has 4 divisors (see below), whose sum is σ = 164026779216. Its totient is φ = 82013389604.

The previous prime is 123020084387. The next prime is 123020084419. The reversal of 123020084409 is 904480020321.

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 123020084409 - 2¹⁵ = 123020051641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123020084409.

It is not an unprimeable number, because it can be changed into a prime (123020084419) 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, 20503347399 + ... + 20503347404.

It is an arithmetic number, because the mean of its divisors is an integer number (41006694804).

Almost surely, 2^123020084409 is an apocalyptic number.

It is an amenable number.

123020084409 is a deficient number, since it is larger than the sum of its proper divisors (41006694807).

123020084409 is an equidigital number, since it uses as much as digits as its factorization.

123020084409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41006694806.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 123020084409 in words is "one hundred twenty-three billion, twenty million, eighty-four thousand, four hundred nine".