85669811 has 2 divisors, whose sum is σ = 85669812. Its totient is φ = 85669810.

The previous prime is 85669777. The next prime is 85669813. The reversal of 85669811 is 11896658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85669811 - 2¹⁰ = 85668787 is a prime.

Together with 85669813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85669813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42834905 + 42834906.

It is an arithmetic number, because the mean of its divisors is an integer number (42834906).

Almost surely, 2^85669811 is an apocalyptic number.

85669811 is a deficient number, since it is larger than the sum of its proper divisors (1).

85669811 is an equidigital number, since it uses as much as digits as its factorization.

85669811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 85669811 is about 9255.7987769830. The cubic root of 85669811 is about 440.8348663493.

The spelling of 85669811 in words is "eighty-five million, six hundred sixty-nine thousand, eight hundred eleven".