85983121117 has 2 divisors, whose sum is σ = 85983121118. Its totient is φ = 85983121116.

The previous prime is 85983121111. The next prime is 85983121121. The reversal of 85983121117 is 71112138958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78228733636 + 7754387481 = 279694^2 + 88059^2 .

It is a cyclic number.

It is not a de Polignac number, because 85983121117 - 2⁷ = 85983120989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85983121111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42991560558 + 42991560559.

It is an arithmetic number, because the mean of its divisors is an integer number (42991560559).

Almost surely, 2^85983121117 is an apocalyptic number.

It is an amenable number.

85983121117 is a deficient number, since it is larger than the sum of its proper divisors (1).

85983121117 is an equidigital number, since it uses as much as digits as its factorization.

85983121117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 46.

The spelling of 85983121117 in words is "eighty-five billion, nine hundred eighty-three million, one hundred twenty-one thousand, one hundred seventeen".