985100899 has 4 divisors (see below), whose sum is σ = 985164336. Its totient is φ = 985037464.

The previous prime is 985100881. The next prime is 985100929. The reversal of 985100899 is 998001589.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 985100899 - 2¹⁹ = 984576611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985100869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8997 + ... + 45289.

It is an arithmetic number, because the mean of its divisors is an integer number (246291084).

Almost surely, 2^985100899 is an apocalyptic number.

985100899 is a deficient number, since it is larger than the sum of its proper divisors (63437).

985100899 is a wasteful number, since it uses less digits than its factorization.

985100899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63436.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 985100899 is about 31386.3170665180. The cubic root of 985100899 is about 995.0087619911.

The spelling of 985100899 in words is "nine hundred eighty-five million, one hundred thousand, eight hundred ninety-nine".