82392921 has 12 divisors (see below), whose sum is σ = 128166948. Its totient is φ = 50703264.

The previous prime is 82392917. The next prime is 82392929. The reversal of 82392921 is 12929328.

It can be written as a sum of positive squares in 2 ways, for example, as 32901696 + 49491225 = 5736^2 + 7035^2 .

It is not a de Polignac number, because 82392921 - 2² = 82392917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82392929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351990 + ... + 352223.

It is an arithmetic number, because the mean of its divisors is an integer number (10680579).

Almost surely, 2^82392921 is an apocalyptic number.

It is an amenable number.

82392921 is a deficient number, since it is larger than the sum of its proper divisors (45774027).

82392921 is a wasteful number, since it uses less digits than its factorization.

82392921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704232 (or 704229 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 82392921 is about 9077.0546434402. The cubic root of 82392921 is about 435.1409610549.

The spelling of 82392921 in words is "eighty-two million, three hundred ninety-two thousand, nine hundred twenty-one".