260261917 has 2 divisors, whose sum is σ = 260261918. Its totient is φ = 260261916.

The previous prime is 260261909. The next prime is 260261941. The reversal of 260261917 is 719162062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182628196 + 77633721 = 13514^2 + 8811^2 .

It is a cyclic number.

It is not a de Polignac number, because 260261917 - 2³ = 260261909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260261977) 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, 130130958 + 130130959.

It is an arithmetic number, because the mean of its divisors is an integer number (130130959).

Almost surely, 2^260261917 is an apocalyptic number.

It is an amenable number.

260261917 is a deficient number, since it is larger than the sum of its proper divisors (1).

260261917 is an equidigital number, since it uses as much as digits as its factorization.

260261917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 260261917 is about 16132.6351536257. The cubic root of 260261917 is about 638.4646767264.

The spelling of 260261917 in words is "two hundred sixty million, two hundred sixty-one thousand, nine hundred seventeen".