260043409 has 2 divisors, whose sum is σ = 260043410. Its totient is φ = 260043408.

The previous prime is 260043389. The next prime is 260043457. The reversal of 260043409 is 904340062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241895809 + 18147600 = 15553^2 + 4260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260043409 is a prime.

It is not a weakly prime, because it can be changed into another prime (260043479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130021704 + 130021705.

It is an arithmetic number, because the mean of its divisors is an integer number (130021705).

Almost surely, 2^260043409 is an apocalyptic number.

It is an amenable number.

260043409 is a deficient number, since it is larger than the sum of its proper divisors (1).

260043409 is an equidigital number, since it uses as much as digits as its factorization.

260043409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 260043409 is about 16125.8614963666. The cubic root of 260043409 is about 638.2859481823.

The spelling of 260043409 in words is "two hundred sixty million, forty-three thousand, four hundred nine".