260540191 has 2 divisors, whose sum is σ = 260540192. Its totient is φ = 260540190.

The previous prime is 260540177. The next prime is 260540227. The reversal of 260540191 is 191045062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260540191 - 2²³ = 252151583 is a prime.

It is a super-2 number, since 2×260540191² = 135762382252632962, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260540491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130270095 + 130270096.

It is an arithmetic number, because the mean of its divisors is an integer number (130270096).

Almost surely, 2^260540191 is an apocalyptic number.

260540191 is a deficient number, since it is larger than the sum of its proper divisors (1).

260540191 is an equidigital number, since it uses as much as digits as its factorization.

260540191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 260540191 is about 16141.2574169425. The cubic root of 260540191 is about 638.6921460872.

The spelling of 260540191 in words is "two hundred sixty million, five hundred forty thousand, one hundred ninety-one".