6131491 has 2 divisors, whose sum is σ = 6131492. Its totient is φ = 6131490.

The previous prime is 6131473. The next prime is 6131507. The reversal of 6131491 is 1941316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6131491 - 2⁹ = 6130979 is a prime.

It is not a weakly prime, because it can be changed into another prime (6131401) 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, 3065745 + 3065746.

It is an arithmetic number, because the mean of its divisors is an integer number (3065746).

Almost surely, 2^6131491 is an apocalyptic number.

6131491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6131491 is an equidigital number, since it uses as much as digits as its factorization.

6131491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 6131491 is about 2476.1847669348. The cubic root of 6131491 is about 183.0298954812.

The spelling of 6131491 in words is "six million, one hundred thirty-one thousand, four hundred ninety-one".