82921873 has 2 divisors, whose sum is σ = 82921874. Its totient is φ = 82921872.

The previous prime is 82921843. The next prime is 82921913. The reversal of 82921873 is 37812928.

It is an a-pointer prime, because the next prime (82921913) can be obtained adding 82921873 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82755409 + 166464 = 9097^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 82921873 - 2⁹ = 82921361 is a prime.

It is not a weakly prime, because it can be changed into another prime (82921843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41460936 + 41460937.

It is an arithmetic number, because the mean of its divisors is an integer number (41460937).

Almost surely, 2^82921873 is an apocalyptic number.

It is an amenable number.

82921873 is a deficient number, since it is larger than the sum of its proper divisors (1).

82921873 is an equidigital number, since it uses as much as digits as its factorization.

82921873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 82921873 is about 9106.1447934897. The cubic root of 82921873 is about 436.0701585188.

The spelling of 82921873 in words is "eighty-two million, nine hundred twenty-one thousand, eight hundred seventy-three".