82940213 has 2 divisors, whose sum is σ = 82940214. Its totient is φ = 82940212.

The previous prime is 82940183. The next prime is 82940219. The reversal of 82940213 is 31204928.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63075364 + 19864849 = 7942^2 + 4457^2 .

It is a cyclic number.

It is not a de Polignac number, because 82940213 - 2²⁶ = 15831349 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 (82940219) 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 as a sum of consecutive naturals, namely, 41470106 + 41470107.

It is an arithmetic number, because the mean of its divisors is an integer number (41470107).

Almost surely, 2^82940213 is an apocalyptic number.

It is an amenable number.

82940213 is a deficient number, since it is larger than the sum of its proper divisors (1).

82940213 is an equidigital number, since it uses as much as digits as its factorization.

82940213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 82940213 is about 9107.1517501357. The cubic root of 82940213 is about 436.1023049915.

The spelling of 82940213 in words is "eighty-two million, nine hundred forty thousand, two hundred thirteen".