85456829 has 4 divisors (see below), whose sum is σ = 87069276. Its totient is φ = 83844384.

The previous prime is 85456817. The next prime is 85456831. The reversal of 85456829 is 92865458.

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 34833604 + 50623225 = 5902^2 + 7115^2 .

It is a cyclic number.

It is not a de Polignac number, because 85456829 - 2²⁰ = 84408253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85456859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806144 + ... + 806249.

It is an arithmetic number, because the mean of its divisors is an integer number (21767319).

Almost surely, 2^85456829 is an apocalyptic number.

It is an amenable number.

85456829 is a deficient number, since it is larger than the sum of its proper divisors (1612447).

85456829 is a wasteful number, since it uses less digits than its factorization.

85456829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612446.

The product of its digits is 691200, while the sum is 47.

The square root of 85456829 is about 9244.2862893790. The cubic root of 85456829 is about 440.4692462864.

The spelling of 85456829 in words is "eighty-five million, four hundred fifty-six thousand, eight hundred twenty-nine".