82397213 has 2 divisors, whose sum is σ = 82397214. Its totient is φ = 82397212.

The previous prime is 82397197. The next prime is 82397221. The reversal of 82397213 is 31279328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58171129 + 24226084 = 7627^2 + 4922^2 .

It is a cyclic number.

It is not a de Polignac number, because 82397213 - 2⁴ = 82397197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82397233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41198606 + 41198607.

It is an arithmetic number, because the mean of its divisors is an integer number (41198607).

Almost surely, 2^82397213 is an apocalyptic number.

It is an amenable number.

82397213 is a deficient number, since it is larger than the sum of its proper divisors (1).

82397213 is an equidigital number, since it uses as much as digits as its factorization.

82397213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 82397213 is about 9077.2910606634. The cubic root of 82397213 is about 435.1485166901.

The spelling of 82397213 in words is "eighty-two million, three hundred ninety-seven thousand, two hundred thirteen".