82180279 has 2 divisors, whose sum is σ = 82180280. Its totient is φ = 82180278.

The previous prime is 82180271. The next prime is 82180283. The reversal of 82180279 is 97208128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82180279 - 2³ = 82180271 is a prime.

It is a Chen prime.

It is equal to p_4789333 and since 82180279 and 4789333 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82180271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41090139 + 41090140.

It is an arithmetic number, because the mean of its divisors is an integer number (41090140).

Almost surely, 2^82180279 is an apocalyptic number.

82180279 is a deficient number, since it is larger than the sum of its proper divisors (1).

82180279 is an equidigital number, since it uses as much as digits as its factorization.

82180279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 82180279 is about 9065.3339155268. Note that the first 3 decimals coincide. The cubic root of 82180279 is about 434.7662971552.

The spelling of 82180279 in words is "eighty-two million, one hundred eighty thousand, two hundred seventy-nine".