8537995989 has 6 divisors (see below), whose sum is σ = 12332660886. Its totient is φ = 5691997320.

The previous prime is 8537995987. The next prime is 8537995993. The reversal of 8537995989 is 9895997358.

8537995989 is a `hidden beast` number, since 8 + 537 + 9 + 9 + 5 + 9 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4838315364 + 3699680625 = 69558^2 + 60825^2 .

It is not a de Polignac number, because 8537995989 - 2¹ = 8537995987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8537995981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 474333102 + ... + 474333119.

It is an arithmetic number, because the mean of its divisors is an integer number (2055443481).

Almost surely, 2^8537995989 is an apocalyptic number.

It is an amenable number.

8537995989 is a deficient number, since it is larger than the sum of its proper divisors (3794664897).

8537995989 is a wasteful number, since it uses less digits than its factorization.

8537995989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948666227 (or 948666224 counting only the distinct ones).

The product of its digits is 220449600, while the sum is 72.

The square root of 8537995989 is about 92401.2769879291. The cubic root of 8537995989 is about 2043.8639433036.

The spelling of 8537995989 in words is "eight billion, five hundred thirty-seven million, nine hundred ninety-five thousand, nine hundred eighty-nine".