9999925287 has 16 divisors (see below), whose sum is σ = 14938465152. Its totient is φ = 5896761120.

The previous prime is 9999925277. The next prime is 9999925289. The reversal of 9999925287 is 7825299999.

It is not a de Polignac number, because 9999925287 - 2¹⁵ = 9999892519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999925289) 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, 4093753 + ... + 4096194.

It is an arithmetic number, because the mean of its divisors is an integer number (933654072).

Almost surely, 2^9999925287 is an apocalyptic number.

9999925287 is a deficient number, since it is larger than the sum of its proper divisors (4938539865).

9999925287 is a wasteful number, since it uses less digits than its factorization.

9999925287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8189998.

The product of its digits is 66134880, while the sum is 69.

The square root of 9999925287 is about 99999.6264343022. The cubic root of 9999925287 is about 2154.4293245426.

The spelling of 9999925287 in words is "nine billion, nine hundred ninety-nine million, nine hundred twenty-five thousand, two hundred eighty-seven".