85969058209 has 2 divisors, whose sum is σ = 85969058210. Its totient is φ = 85969058208.

The previous prime is 85969058143. The next prime is 85969058239. The reversal of 85969058209 is 90285096958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43192477584 + 42776580625 = 207828^2 + 206825^2 .

It is a cyclic number.

It is not a de Polignac number, because 85969058209 - 2²³ = 85960669601 is a prime.

It is not a weakly prime, because it can be changed into another prime (85969058239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42984529104 + 42984529105.

It is an arithmetic number, because the mean of its divisors is an integer number (42984529105).

Almost surely, 2^85969058209 is an apocalyptic number.

It is an amenable number.

85969058209 is a deficient number, since it is larger than the sum of its proper divisors (1).

85969058209 is an equidigital number, since it uses as much as digits as its factorization.

85969058209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13996800, while the sum is 61.

The spelling of 85969058209 in words is "eighty-five billion, nine hundred sixty-nine million, fifty-eight thousand, two hundred nine".