82140871 has 2 divisors, whose sum is σ = 82140872. Its totient is φ = 82140870.

The previous prime is 82140833. The next prime is 82140899. The reversal of 82140871 is 17804128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82140871 - 2¹³ = 82132679 is a prime.

It is equal to p_4787212 and since 82140871 and 4787212 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 (82144871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41070435 + 41070436.

It is an arithmetic number, because the mean of its divisors is an integer number (41070436).

Almost surely, 2^82140871 is an apocalyptic number.

82140871 is a deficient number, since it is larger than the sum of its proper divisors (1).

82140871 is an equidigital number, since it uses as much as digits as its factorization.

82140871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 82140871 is about 9063.1601000975. The cubic root of 82140871 is about 434.6967913896.

Adding to 82140871 its reverse (17804128), we get a palindrome (99944999).

The spelling of 82140871 in words is "eighty-two million, one hundred forty thousand, eight hundred seventy-one".