83168405 has 4 divisors (see below), whose sum is σ = 99802092. Its totient is φ = 66534720.

The previous prime is 83168387. The next prime is 83168411. The reversal of 83168405 is 50486138.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50486138 = 2 ⋅25243069.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 32160241 = 7142^2 + 5671^2 .

It is a de Polignac number, because none of the positive numbers 2^k-83168405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8316836 + ... + 8316845.

It is an arithmetic number, because the mean of its divisors is an integer number (24950523).

Almost surely, 2^83168405 is an apocalyptic number.

It is an amenable number.

83168405 is a deficient number, since it is larger than the sum of its proper divisors (16633687).

83168405 is a wasteful number, since it uses less digits than its factorization.

83168405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16633686.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 83168405 is about 9119.6713208317. The cubic root of 83168405 is about 436.5018857181.

The spelling of 83168405 in words is "eighty-three million, one hundred sixty-eight thousand, four hundred five".