82921875 has 56 divisors (see below), whose sum is σ = 145310640. Its totient is φ = 42000000.

The previous prime is 82921873. The next prime is 82921913. The reversal of 82921875 is 57812928.

It is not a de Polignac number, because 82921875 - 2¹ = 82921873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82921873) 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 55 ways as a sum of consecutive naturals, for example, 1359345 + ... + 1359405.

Almost surely, 2^82921875 is an apocalyptic number.

82921875 is a deficient number, since it is larger than the sum of its proper divisors (62388765).

82921875 is an frugal number, since it uses more digits than its factorization.

82921875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 98 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 82921875 is about 9106.1449033057. The cubic root of 82921875 is about 436.0701620247.

The spelling of 82921875 in words is "eighty-two million, nine hundred twenty-one thousand, eight hundred seventy-five".