1234209128979 has 16 divisors (see below), whose sum is σ = 1698746301440. Its totient is φ = 796240579680.

The previous prime is 1234209128909. The next prime is 1234209129011. The reversal of 1234209128979 is 9798219024321.

It is not a de Polignac number, because 1234209128979 - 2¹⁶ = 1234209063443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1234209128909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3331752 + ... + 3683610.

It is an arithmetic number, because the mean of its divisors is an integer number (106171643840).

Almost surely, 2^{1234209128979} is an apocalyptic number.

1234209128979 is a deficient number, since it is larger than the sum of its proper divisors (464537172461).

1234209128979 is a wasteful number, since it uses less digits than its factorization.

1234209128979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389610.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 1234209128979 in words is "one trillion, two hundred thirty-four billion, two hundred nine million, one hundred twenty-eight thousand, nine hundred seventy-nine".