83981169 has 6 divisors (see below), whose sum is σ = 121306146. Its totient is φ = 55987440.

The previous prime is 83981123. The next prime is 83981179. The reversal of 83981169 is 96118938.

It can be written as a sum of positive squares in only one way, i.e., 74909025 + 9072144 = 8655^2 + 3012^2 .

It is not a de Polignac number, because 83981169 - 2⁷ = 83981041 is a prime.

It is a super-2 number, since 2×83981169² = 14105673493213122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83981179) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4665612 + ... + 4665629.

It is an arithmetic number, because the mean of its divisors is an integer number (20217691).

Almost surely, 2^83981169 is an apocalyptic number.

It is an amenable number.

83981169 is a deficient number, since it is larger than the sum of its proper divisors (37324977).

83981169 is a wasteful number, since it uses less digits than its factorization.

83981169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331247 (or 9331244 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 83981169 is about 9164.1240170569. The cubic root of 83981169 is about 437.9191850648.

The spelling of 83981169 in words is "eighty-three million, nine hundred eighty-one thousand, one hundred sixty-nine".