85406869 has 4 divisors (see below), whose sum is σ = 86162796. Its totient is φ = 84650944.

The previous prime is 85406837. The next prime is 85406887. The reversal of 85406869 is 96860458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37271025 + 48135844 = 6105^2 + 6938^2 .

It is a cyclic number.

It is not a de Polignac number, because 85406869 - 2⁵ = 85406837 is a prime.

It is a super-2 number, since 2×85406869² = 14588666544766322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85406809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377794 + ... + 378019.

It is an arithmetic number, because the mean of its divisors is an integer number (21540699).

Almost surely, 2^85406869 is an apocalyptic number.

It is an amenable number.

85406869 is a deficient number, since it is larger than the sum of its proper divisors (755927).

85406869 is a wasteful number, since it uses less digits than its factorization.

85406869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755926.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 85406869 is about 9241.5836846290. The cubic root of 85406869 is about 440.3833934506.

The spelling of 85406869 in words is "eighty-five million, four hundred six thousand, eight hundred sixty-nine".