82111669 has 2 divisors, whose sum is σ = 82111670. Its totient is φ = 82111668.

The previous prime is 82111663. The next prime is 82111697. The reversal of 82111669 is 96611128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78978769 + 3132900 = 8887^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 82111669 - 2⁵ = 82111637 is a prime.

It is a super-2 number, since 2×82111669² = 13484652371931122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82111663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41055834 + 41055835.

It is an arithmetic number, because the mean of its divisors is an integer number (41055835).

Almost surely, 2^82111669 is an apocalyptic number.

It is an amenable number.

82111669 is a deficient number, since it is larger than the sum of its proper divisors (1).

82111669 is an equidigital number, since it uses as much as digits as its factorization.

82111669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 82111669 is about 9061.5489294050. The cubic root of 82111669 is about 434.6452720906.

The spelling of 82111669 in words is "eighty-two million, one hundred eleven thousand, six hundred sixty-nine".