985891199 has 4 divisors (see below), whose sum is σ = 995652600. Its totient is φ = 976129800.

The previous prime is 985891169. The next prime is 985891201. The reversal of 985891199 is 991198589.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991198589 = 1637 ⋅605497.

It is a cyclic number.

It is not a de Polignac number, because 985891199 - 2¹⁶ = 985825663 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 (985891139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4880549 + ... + 4880750.

It is an arithmetic number, because the mean of its divisors is an integer number (248913150).

Almost surely, 2^985891199 is an apocalyptic number.

985891199 is a deficient number, since it is larger than the sum of its proper divisors (9761401).

985891199 is a wasteful number, since it uses less digits than its factorization.

985891199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9761400.

The product of its digits is 2099520, while the sum is 59.

The square root of 985891199 is about 31398.9044235623. The cubic root of 985891199 is about 995.2747737380.

The spelling of 985891199 in words is "nine hundred eighty-five million, eight hundred ninety-one thousand, one hundred ninety-nine".