82642471 has 2 divisors, whose sum is σ = 82642472. Its totient is φ = 82642470.

The previous prime is 82642459. The next prime is 82642477. The reversal of 82642471 is 17424628.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82642471 - 2⁹ = 82641959 is a prime.

It is a super-3 number, since 3×82642471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82642477) 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, 41321235 + 41321236.

It is an arithmetic number, because the mean of its divisors is an integer number (41321236).

Almost surely, 2^82642471 is an apocalyptic number.

82642471 is a deficient number, since it is larger than the sum of its proper divisors (1).

82642471 is an equidigital number, since it uses as much as digits as its factorization.

82642471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

The square root of 82642471 is about 9090.7904496804. The cubic root of 82642471 is about 435.5798336282.

The spelling of 82642471 in words is "eighty-two million, six hundred forty-two thousand, four hundred seventy-one".