82121704 has 16 divisors (see below), whose sum is σ = 175975200. Its totient is φ = 35194992.

The previous prime is 82121639. The next prime is 82121719. The reversal of 82121704 is 40712128.

It is a happy 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, 733174 + ... + 733285.

It is an arithmetic number, because the mean of its divisors is an integer number (10998450).

Almost surely, 2^82121704 is an apocalyptic number.

It is an amenable number.

82121704 is an abundant number, since it is smaller than the sum of its proper divisors (93853496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82121704 is a wasteful number, since it uses less digits than its factorization.

82121704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466472 (or 1466468 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 82121704 is about 9062.1026257707. The cubic root of 82121704 is about 434.6629776034.

The spelling of 82121704 in words is "eighty-two million, one hundred twenty-one thousand, seven hundred four".