9191748131 has 2 divisors, whose sum is σ = 9191748132. Its totient is φ = 9191748130.

The previous prime is 9191748113. The next prime is 9191748143. The reversal of 9191748131 is 1318471919.

Together with previous prime (9191748113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1318471919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9191748131 - 2¹⁰ = 9191747107 is a prime.

It is a super-2 number, since 2×9191748131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9191748101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4595874065 + 4595874066.

It is an arithmetic number, because the mean of its divisors is an integer number (4595874066).

Almost surely, 2^9191748131 is an apocalyptic number.

9191748131 is a deficient number, since it is larger than the sum of its proper divisors (1).

9191748131 is an equidigital number, since it uses as much as digits as its factorization.

9191748131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 44.

The square root of 9191748131 is about 95873.6049755093. The cubic root of 9191748131 is about 2094.7524409055.

The spelling of 9191748131 in words is "nine billion, one hundred ninety-one million, seven hundred forty-eight thousand, one hundred thirty-one".