85020839 has 8 divisors (see below), whose sum is σ = 91679280. Its totient is φ = 78580800.

The previous prime is 85020833. The next prime is 85020853. The reversal of 85020839 is 93802058.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85020839 - 2⁴ = 85020823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85020799 and 85020808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85020833) 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 7 ways as a sum of consecutive naturals, for example, 53792 + ... + 55349.

It is an arithmetic number, because the mean of its divisors is an integer number (11459910).

Almost surely, 2^85020839 is an apocalyptic number.

85020839 is a deficient number, since it is larger than the sum of its proper divisors (6658441).

85020839 is a wasteful number, since it uses less digits than its factorization.

85020839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109201.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 85020839 is about 9220.6745414856. The cubic root of 85020839 is about 439.7188958616.

The spelling of 85020839 in words is "eighty-five million, twenty thousand, eight hundred thirty-nine".