85785269 has 2 divisors, whose sum is σ = 85785270. Its totient is φ = 85785268.

The previous prime is 85785257. The next prime is 85785283. The reversal of 85785269 is 96258758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85784644 + 625 = 9262^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 85785269 - 2⁸ = 85785013 is a prime.

It is a super-2 number, since 2×85785269² = 14718224754804722, which contains 22 as substring.

It is equal to p_4986698 and since 85785269 and 4986698 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85785299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42892634 + 42892635.

It is an arithmetic number, because the mean of its divisors is an integer number (42892635).

Almost surely, 2^85785269 is an apocalyptic number.

It is an amenable number.

85785269 is a deficient number, since it is larger than the sum of its proper divisors (1).

85785269 is an equidigital number, since it uses as much as digits as its factorization.

85785269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 50.

The square root of 85785269 is about 9262.0337399515. The cubic root of 85785269 is about 441.0328165308.

The spelling of 85785269 in words is "eighty-five million, seven hundred eighty-five thousand, two hundred sixty-nine".