82647919 has 2 divisors, whose sum is σ = 82647920. Its totient is φ = 82647918.

The previous prime is 82647913. The next prime is 82647937. The reversal of 82647919 is 91974628.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82647919 - 2³ = 82647911 is a prime.

It is a super-2 number, since 2×82647919² = 13661357030061122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82647911) 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, 41323959 + 41323960.

It is an arithmetic number, because the mean of its divisors is an integer number (41323960).

Almost surely, 2^82647919 is an apocalyptic number.

82647919 is a deficient number, since it is larger than the sum of its proper divisors (1).

82647919 is an equidigital number, since it uses as much as digits as its factorization.

82647919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 82647919 is about 9091.0900886527. The cubic root of 82647919 is about 435.5894049247.

The spelling of 82647919 in words is "eighty-two million, six hundred forty-seven thousand, nine hundred nineteen".