82921297 has 4 divisors (see below), whose sum is σ = 83554416. Its totient is φ = 82288180.

The previous prime is 82921259. The next prime is 82921337. The reversal of 82921297 is 79212928.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82921297 - 2⁷ = 82921169 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82921697) 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, 316363 + ... + 316624.

It is an arithmetic number, because the mean of its divisors is an integer number (20888604).

Almost surely, 2^82921297 is an apocalyptic number.

It is an amenable number.

82921297 is a deficient number, since it is larger than the sum of its proper divisors (633119).

82921297 is a wasteful number, since it uses less digits than its factorization.

82921297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633118.

The product of its digits is 36288, while the sum is 40.

The square root of 82921297 is about 9106.1131664393. The cubic root of 82921297 is about 436.0691488255.

The spelling of 82921297 in words is "eighty-two million, nine hundred twenty-one thousand, two hundred ninety-seven".