82466381 has 2 divisors, whose sum is σ = 82466382. Its totient is φ = 82466380.

The previous prime is 82466311. The next prime is 82466443. The reversal of 82466381 is 18366428.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61763881 + 20702500 = 7859^2 + 4550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82466381 is a prime.

It is a super-2 number, since 2×82466381² = 13601407990474322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (82466311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41233190 + 41233191.

It is an arithmetic number, because the mean of its divisors is an integer number (41233191).

Almost surely, 2^82466381 is an apocalyptic number.

It is an amenable number.

82466381 is a deficient number, since it is larger than the sum of its proper divisors (1).

82466381 is an equidigital number, since it uses as much as digits as its factorization.

82466381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 82466381 is about 9081.1002086752. The cubic root of 82466381 is about 435.2702438435.

The spelling of 82466381 in words is "eighty-two million, four hundred sixty-six thousand, three hundred eighty-one".