85993806997 has 6 divisors (see below), whose sum is σ = 100033612278. Its totient is φ = 73708977384.

The previous prime is 85993806967. The next prime is 85993807013. The reversal of 85993806997 is 79960839958.

It can be written as a sum of positive squares in only one way, i.e., 83566668241 + 2427138756 = 289079^2 + 49266^2 .

It is not a de Polignac number, because 85993806997 - 2⁷ = 85993806869 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 (85993806937) 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, 877487778 + ... + 877487875.

It is an arithmetic number, because the mean of its divisors is an integer number (16672268713).

Almost surely, 2^85993806997 is an apocalyptic number.

It is an amenable number.

85993806997 is a deficient number, since it is larger than the sum of its proper divisors (14039805281).

85993806997 is a wasteful number, since it uses less digits than its factorization.

85993806997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754975667 (or 1754975660 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 73.

The spelling of 85993806997 in words is "eighty-five billion, nine hundred ninety-three million, eight hundred six thousand, nine hundred ninety-seven".