85135769 has 4 divisors (see below), whose sum is σ = 85707300. Its totient is φ = 84564240.

The previous prime is 85135759. The next prime is 85135777. The reversal of 85135769 is 96753158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96753158 = 2 ⋅48376579.

It can be written as a sum of positive squares in 2 ways, for example, as 2598544 + 82537225 = 1612^2 + 9085^2 .

It is a cyclic number.

It is not a de Polignac number, because 85135769 - 2²⁰ = 84087193 is a prime.

It is a super-2 number, since 2×85135769² = 14496198326442722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85135759) 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 in 3 ways as a sum of consecutive naturals, for example, 285542 + ... + 285839.

It is an arithmetic number, because the mean of its divisors is an integer number (21426825).

Almost surely, 2^85135769 is an apocalyptic number.

It is an amenable number.

85135769 is a deficient number, since it is larger than the sum of its proper divisors (571531).

85135769 is a wasteful number, since it uses less digits than its factorization.

85135769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571530.

The product of its digits is 226800, while the sum is 44.

The square root of 85135769 is about 9226.9046272301. The cubic root of 85135769 is about 439.9169419669.

The spelling of 85135769 in words is "eighty-five million, one hundred thirty-five thousand, seven hundred sixty-nine".