85317769 has 2 divisors, whose sum is σ = 85317770. Its totient is φ = 85317768.

The previous prime is 85317763. The next prime is 85317821. The reversal of 85317769 is 96771358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67568400 + 17749369 = 8220^2 + 4213^2 .

It is a cyclic number.

It is not a de Polignac number, because 85317769 - 2⁷ = 85317641 is a prime.

It is a super-2 number, since 2×85317769² = 14558243414274722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85317763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42658884 + 42658885.

It is an arithmetic number, because the mean of its divisors is an integer number (42658885).

Almost surely, 2^85317769 is an apocalyptic number.

It is an amenable number.

85317769 is a deficient number, since it is larger than the sum of its proper divisors (1).

85317769 is an equidigital number, since it uses as much as digits as its factorization.

85317769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 85317769 is about 9236.7618243625. The cubic root of 85317769 is about 440.2301980707.

The spelling of 85317769 in words is "eighty-five million, three hundred seventeen thousand, seven hundred sixty-nine".