85608869 has 2 divisors, whose sum is σ = 85608870. Its totient is φ = 85608868.

The previous prime is 85608857. The next prime is 85608871. The reversal of 85608869 is 96880658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59985025 + 25623844 = 7745^2 + 5062^2 .

It is a cyclic number.

It is not a de Polignac number, because 85608869 - 2⁸ = 85608613 is a prime.

It is a super-2 number, since 2×85608869² = 14657756902918322, which contains 22 as substring.

Together with 85608871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85608839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42804434 + 42804435.

It is an arithmetic number, because the mean of its divisors is an integer number (42804435).

Almost surely, 2^85608869 is an apocalyptic number.

It is an amenable number.

85608869 is a deficient number, since it is larger than the sum of its proper divisors (1).

85608869 is an equidigital number, since it uses as much as digits as its factorization.

85608869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 85608869 is about 9252.5060929458. The cubic root of 85608869 is about 440.7303109214.

The spelling of 85608869 in words is "eighty-five million, six hundred eight thousand, eight hundred sixty-nine".