9939131 has 2 divisors, whose sum is σ = 9939132. Its totient is φ = 9939130.

The previous prime is 9939103. The next prime is 9939211. The reversal of 9939131 is 1319399.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1319399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9939131 - 2¹⁰ = 9938107 is a prime.

It is a super-2 number, since 2×9939131² = 197572650070322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9939091 and 9939100.

It is not a weakly prime, because it can be changed into another prime (9939031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4969565 + 4969566.

It is an arithmetic number, because the mean of its divisors is an integer number (4969566).

Almost surely, 2^9939131 is an apocalyptic number.

9939131 is a deficient number, since it is larger than the sum of its proper divisors (1).

9939131 is an equidigital number, since it uses as much as digits as its factorization.

9939131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6561, while the sum is 35.

The square root of 9939131 is about 3152.6387360432. The cubic root of 9939131 is about 215.0054514572.

The spelling of 9939131 in words is "nine million, nine hundred thirty-nine thousand, one hundred thirty-one".