83406078121 has 4 divisors (see below), whose sum is σ = 83598702292. Its totient is φ = 83213453952.

The previous prime is 83406078101. The next prime is 83406078127. The reversal of 83406078121 is 12187060438.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52663365225 + 30742712896 = 229485^2 + 175336^2 .

It is a cyclic number.

It is not a de Polignac number, because 83406078121 - 2³³ = 74816143529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83406078127) 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, 96311436 + ... + 96312301.

It is an arithmetic number, because the mean of its divisors is an integer number (20899675573).

Almost surely, 2^83406078121 is an apocalyptic number.

It is an amenable number.

83406078121 is a deficient number, since it is larger than the sum of its proper divisors (192624171).

83406078121 is a wasteful number, since it uses less digits than its factorization.

83406078121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192624170.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 83406078121 in words is "eighty-three billion, four hundred six million, seventy-eight thousand, one hundred twenty-one".