85455869 has 2 divisors, whose sum is σ = 85455870. Its totient is φ = 85455868.

The previous prime is 85455817. The next prime is 85455893. The reversal of 85455869 is 96855458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72760900 + 12694969 = 8530^2 + 3563^2 .

It is a cyclic number.

It is not a de Polignac number, because 85455869 - 2²⁴ = 68678653 is a prime.

It is a super-2 number, since 2×85455869² = 14605411093090322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85455899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42727934 + 42727935.

It is an arithmetic number, because the mean of its divisors is an integer number (42727935).

Almost surely, 2^85455869 is an apocalyptic number.

It is an amenable number.

85455869 is a deficient number, since it is larger than the sum of its proper divisors (1).

85455869 is an equidigital number, since it uses as much as digits as its factorization.

85455869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728000, while the sum is 50.

The square root of 85455869 is about 9244.2343652679. The cubic root of 85455869 is about 440.4675969075.

The spelling of 85455869 in words is "eighty-five million, four hundred fifty-five thousand, eight hundred sixty-nine".