83649317 has 4 divisors (see below), whose sum is σ = 85227660. Its totient is φ = 82070976.

The previous prime is 83649271. The next prime is 83649329. The reversal of 83649317 is 71394638.

It is a Cunningham number, because it is equal to 9146²+1.

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 60310756 + 23338561 = 7766^2 + 4831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83649317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83649337) 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, 789092 + ... + 789197.

It is an arithmetic number, because the mean of its divisors is an integer number (21306915).

Almost surely, 2^83649317 is an apocalyptic number.

It is an amenable number.

83649317 is a deficient number, since it is larger than the sum of its proper divisors (1578343).

83649317 is a wasteful number, since it uses less digits than its factorization.

83649317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578342.

The product of its digits is 108864, while the sum is 41.

The square root of 83649317 is about 9146.0000546687. Note that the first 4 decimals coincide. The cubic root of 83649317 is about 437.3416103653.

The spelling of 83649317 in words is "eighty-three million, six hundred forty-nine thousand, three hundred seventeen".