9131791 has 2 divisors, whose sum is σ = 9131792. Its totient is φ = 9131790.

The previous prime is 9131783. The next prime is 9131797. The reversal of 9131791 is 1971319.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9131791 - 2³ = 9131783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9131797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4565895 + 4565896.

It is an arithmetic number, because the mean of its divisors is an integer number (4565896).

Almost surely, 2^9131791 is an apocalyptic number.

9131791 is a deficient number, since it is larger than the sum of its proper divisors (1).

9131791 is an equidigital number, since it uses as much as digits as its factorization.

9131791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701, while the sum is 31.

The square root of 9131791 is about 3021.8853386586. The cubic root of 9131791 is about 209.0187860375.

It can be divided in two parts, 913 and 1791, that added together give a square (2704 = 52²).

The spelling of 9131791 in words is "nine million, one hundred thirty-one thousand, seven hundred ninety-one".