899931394287 has 80 divisors (see below), whose sum is σ = 1413843763200. Its totient is φ = 569746742400.

The previous prime is 899931394259. The next prime is 899931394319. The reversal of 899931394287 is 782493139998.

899931394287 is a `hidden beast` number, since 89 + 9 + 93 + 1 + 39 + 428 + 7 = 666.

It is not a de Polignac number, because 899931394287 - 2¹² = 899931390191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899931394217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 36464962 + ... + 36489632.

It is an arithmetic number, because the mean of its divisors is an integer number (17673047040).

Almost surely, 2^899931394287 is an apocalyptic number.

899931394287 is a deficient number, since it is larger than the sum of its proper divisors (513912368913).

899931394287 is a wasteful number, since it uses less digits than its factorization.

899931394287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24986 (or 24977 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The spelling of 899931394287 in words is "eight hundred ninety-nine billion, nine hundred thirty-one million, three hundred ninety-four thousand, two hundred eighty-seven".