82143641 has 2 divisors, whose sum is σ = 82143642. Its totient is φ = 82143640.

The previous prime is 82143619. The next prime is 82143661. The reversal of 82143641 is 14634128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 28047616 = 7355^2 + 5296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82143641 is a prime.

It is not a weakly prime, because it can be changed into another prime (82143661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41071820 + 41071821.

It is an arithmetic number, because the mean of its divisors is an integer number (41071821).

Almost surely, 2^82143641 is an apocalyptic number.

It is an amenable number.

82143641 is a deficient number, since it is larger than the sum of its proper divisors (1).

82143641 is an equidigital number, since it uses as much as digits as its factorization.

82143641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

The square root of 82143641 is about 9063.3129152645. The cubic root of 82143641 is about 434.7016776968.

Adding to 82143641 its reverse (14634128), we get a palindrome (96777769).

The spelling of 82143641 in words is "eighty-two million, one hundred forty-three thousand, six hundred forty-one".