9791279131 has 2 divisors, whose sum is σ = 9791279132. Its totient is φ = 9791279130.

The previous prime is 9791279129. The next prime is 9791279143. The reversal of 9791279131 is 1319721979.

It is a weak prime.

It is an emirp because it is prime and its reverse (1319721979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9791279131 - 2¹ = 9791279129 is a prime.

It is a super-2 number, since 2×9791279131² (a number of 21 digits) contains 22 as substring.

Together with 9791279129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9791279171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895639565 + 4895639566.

It is an arithmetic number, because the mean of its divisors is an integer number (4895639566).

Almost surely, 2^9791279131 is an apocalyptic number.

9791279131 is a deficient number, since it is larger than the sum of its proper divisors (1).

9791279131 is an equidigital number, since it uses as much as digits as its factorization.

9791279131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 214326, while the sum is 49.

The square root of 9791279131 is about 98950.8925225033. The cubic root of 9791279131 is about 2139.3399958293.

The spelling of 9791279131 in words is "nine billion, seven hundred ninety-one million, two hundred seventy-nine thousand, one hundred thirty-one".