831849985 has 16 divisors (see below), whose sum is σ = 1016309952. Its totient is φ = 653457600.

The previous prime is 831849983. The next prime is 831850003. The reversal of 831849985 is 589948138.

It is not a de Polignac number, because 831849985 - 2¹ = 831849983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831849983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208782 + ... + 212728.

It is an arithmetic number, because the mean of its divisors is an integer number (63519372).

Almost surely, 2^831849985 is an apocalyptic number.

It is an amenable number.

831849985 is a deficient number, since it is larger than the sum of its proper divisors (184459967).

831849985 is a wasteful number, since it uses less digits than its factorization.

831849985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704.

The product of its digits is 2488320, while the sum is 55.

The square root of 831849985 is about 28841.8096692978. The cubic root of 831849985 is about 940.4773435698.

The spelling of 831849985 in words is "eight hundred thirty-one million, eight hundred forty-nine thousand, nine hundred eighty-five".