9789732131 has 16 divisors (see below), whose sum is σ = 10245999744. Its totient is φ = 9345907584.

The previous prime is 9789732109. The next prime is 9789732143. The reversal of 9789732131 is 1312379879.

It is a cyclic number.

It is not a de Polignac number, because 9789732131 - 2⁶ = 9789732067 is a prime.

It is a super-2 number, since 2×9789732131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9789732131.

It is not an unprimeable number, because it can be changed into a prime (9789732031) 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, 419585 + ... + 442301.

It is an arithmetic number, because the mean of its divisors is an integer number (640374984).

Almost surely, 2^9789732131 is an apocalyptic number.

9789732131 is a deficient number, since it is larger than the sum of its proper divisors (456267613).

9789732131 is a wasteful number, since it uses less digits than its factorization.

9789732131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22990.

The product of its digits is 571536, while the sum is 50.

The square root of 9789732131 is about 98943.0752048874. The cubic root of 9789732131 is about 2139.2273195983.

The spelling of 9789732131 in words is "nine billion, seven hundred eighty-nine million, seven hundred thirty-two thousand, one hundred thirty-one".