9865500993 has 6 divisors (see below), whose sum is σ = 14250168114. Its totient is φ = 6577000656.

The previous prime is 9865500973. The next prime is 9865501027. The reversal of 9865500993 is 3990055689.

9865500993 is a `hidden beast` number, since 9 + 86 + 550 + 0 + 9 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8156257344 + 1709243649 = 90312^2 + 41343^2 .

It is not a de Polignac number, because 9865500993 - 2¹² = 9865496897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9865500913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 548083380 + ... + 548083397.

It is an arithmetic number, because the mean of its divisors is an integer number (2375028019).

Almost surely, 2^9865500993 is an apocalyptic number.

It is an amenable number.

9865500993 is a deficient number, since it is larger than the sum of its proper divisors (4384667121).

9865500993 is a wasteful number, since it uses less digits than its factorization.

9865500993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096166783 (or 1096166780 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The square root of 9865500993 is about 99325.2283813131. The cubic root of 9865500993 is about 2144.7320818813.

The spelling of 9865500993 in words is "nine billion, eight hundred sixty-five million, five hundred thousand, nine hundred ninety-three".