83979834121 has 16 divisors (see below), whose sum is σ = 88382923200. Its totient is φ = 79678312000.

The previous prime is 83979834119. The next prime is 83979834163. The reversal of 83979834121 is 12143897938.

It is a happy number.

It is not a de Polignac number, because 83979834121 - 2¹ = 83979834119 is a prime.

It is a super-2 number, since 2×83979834121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83979834181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5143671 + ... + 5159971.

It is an arithmetic number, because the mean of its divisors is an integer number (5523932700).

Almost surely, 2^83979834121 is an apocalyptic number.

It is an amenable number.

83979834121 is a deficient number, since it is larger than the sum of its proper divisors (4403089079).

83979834121 is a wasteful number, since it uses less digits than its factorization.

83979834121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19400.

The product of its digits is 2612736, while the sum is 55.

The spelling of 83979834121 in words is "eighty-three billion, nine hundred seventy-nine million, eight hundred thirty-four thousand, one hundred twenty-one".