85708829 has 4 divisors (see below), whose sum is σ = 90219840. Its totient is φ = 81197820.

The previous prime is 85708811. The next prime is 85708837. The reversal of 85708829 is 92880758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85708829 - 2¹² = 85704733 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 (85708859) 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, 2255477 + ... + 2255514.

It is an arithmetic number, because the mean of its divisors is an integer number (22554960).

Almost surely, 2^85708829 is an apocalyptic number.

It is an amenable number.

85708829 is a deficient number, since it is larger than the sum of its proper divisors (4511011).

85708829 is a wasteful number, since it uses less digits than its factorization.

85708829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511010.

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 85708829 is about 9257.9062967822. The cubic root of 85708829 is about 440.9017817305.

The spelling of 85708829 in words is "eighty-five million, seven hundred eight thousand, eight hundred twenty-nine".