83643668 has 12 divisors (see below), whose sum is σ = 146454420. Its totient is φ = 41799552.

The previous prime is 83643661. The next prime is 83643701. The reversal of 83643668 is 86634638.

It can be written as a sum of positive squares in 2 ways, for example, as 47306884 + 36336784 = 6878^2 + 6028^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83643661) by changing a digit.

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, 5180 + ... + 13932.

It is an arithmetic number, because the mean of its divisors is an integer number (12204535).

Almost surely, 2^83643668 is an apocalyptic number.

It is an amenable number.

83643668 is a deficient number, since it is larger than the sum of its proper divisors (62810752).

83643668 is a wasteful number, since it uses less digits than its factorization.

83643668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11146 (or 11144 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The square root of 83643668 is about 9145.6912259271. The cubic root of 83643668 is about 437.3317653023.

The spelling of 83643668 in words is "eighty-three million, six hundred forty-three thousand, six hundred sixty-eight".