82143668 has 6 divisors (see below), whose sum is σ = 143751426. Its totient is φ = 41071832.

The previous prime is 82143661. The next prime is 82143671. The reversal of 82143668 is 86634128.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63808144 + 18335524 = 7988^2 + 4282^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82143661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267955 + ... + 10267962.

It is an arithmetic number, because the mean of its divisors is an integer number (23958571).

Almost surely, 2^82143668 is an apocalyptic number.

It is an amenable number.

82143668 is a deficient number, since it is larger than the sum of its proper divisors (61607758).

82143668 is a wasteful number, since it uses less digits than its factorization.

82143668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20535921 (or 20535919 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 82143668 is about 9063.3144047859. The cubic root of 82143668 is about 434.7017253245.

The spelling of 82143668 in words is "eighty-two million, one hundred forty-three thousand, six hundred sixty-eight".