85136069 has 2 divisors, whose sum is σ = 85136070. Its totient is φ = 85136068.

The previous prime is 85136063. The next prime is 85136081. The reversal of 85136069 is 96063158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75463969 + 9672100 = 8687^2 + 3110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85136069 is a prime.

It is a super-2 number, since 2×85136069² = 14496300489545522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85136063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42568034 + 42568035.

It is an arithmetic number, because the mean of its divisors is an integer number (42568035).

Almost surely, 2^85136069 is an apocalyptic number.

It is an amenable number.

85136069 is a deficient number, since it is larger than the sum of its proper divisors (1).

85136069 is an equidigital number, since it uses as much as digits as its factorization.

85136069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 85136069 is about 9226.9208840219. The cubic root of 85136069 is about 439.9174586903.

The spelling of 85136069 in words is "eighty-five million, one hundred thirty-six thousand, sixty-nine".