82094021 has 2 divisors, whose sum is σ = 82094022. Its totient is φ = 82094020.

The previous prime is 82094017. The next prime is 82094029. The reversal of 82094021 is 12049028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67881121 + 14212900 = 8239^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 82094021 - 2² = 82094017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82094029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41047010 + 41047011.

It is an arithmetic number, because the mean of its divisors is an integer number (41047011).

Almost surely, 2^82094021 is an apocalyptic number.

It is an amenable number.

82094021 is a deficient number, since it is larger than the sum of its proper divisors (1).

82094021 is an equidigital number, since it uses as much as digits as its factorization.

82094021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 82094021 is about 9060.5750921230. The cubic root of 82094021 is about 434.6141308839.

The spelling of 82094021 in words is "eighty-two million, ninety-four thousand, twenty-one".