85020993 has 6 divisors (see below), whose sum is σ = 122808114. Its totient is φ = 56680656.

The previous prime is 85020977. The next prime is 85021033. The reversal of 85020993 is 39902058.

It can be written as a sum of positive squares in only one way, i.e., 80407089 + 4613904 = 8967^2 + 2148^2 .

It is not a de Polignac number, because 85020993 - 2⁴ = 85020977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85020913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4723380 + ... + 4723397.

It is an arithmetic number, because the mean of its divisors is an integer number (20468019).

Almost surely, 2^85020993 is an apocalyptic number.

It is an amenable number.

85020993 is a deficient number, since it is larger than the sum of its proper divisors (37787121).

85020993 is a wasteful number, since it uses less digits than its factorization.

85020993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9446783 (or 9446780 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 85020993 is about 9220.6828922808. The cubic root of 85020993 is about 439.7191613521.

The spelling of 85020993 in words is "eighty-five million, twenty thousand, nine hundred ninety-three".