9872131 has 2 divisors, whose sum is σ = 9872132. Its totient is φ = 9872130.

The previous prime is 9872123. The next prime is 9872171. The reversal of 9872131 is 1312789.

It is a weak prime.

It is an emirp because it is prime and its reverse (1312789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9872131 - 2³ = 9872123 is a prime.

It is a super-2 number, since 2×9872131² = 194917940962322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9872093 and 9872102.

It is not a weakly prime, because it can be changed into another prime (9872111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4936065 + 4936066.

It is an arithmetic number, because the mean of its divisors is an integer number (4936066).

Almost surely, 2^9872131 is an apocalyptic number.

9872131 is a deficient number, since it is larger than the sum of its proper divisors (1).

9872131 is an equidigital number, since it uses as much as digits as its factorization.

9872131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 9872131 is about 3141.9947485634. The cubic root of 9872131 is about 214.5212422567.

The spelling of 9872131 in words is "nine million, eight hundred seventy-two thousand, one hundred thirty-one".