260405863 has 2 divisors, whose sum is σ = 260405864. Its totient is φ = 260405862.

The previous prime is 260405857. The next prime is 260405867. The reversal of 260405863 is 368504062.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260405863 - 2¹³ = 260397671 is a prime.

It is a super-2 number, since 2×260405863² = 135622426969549538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260405867) 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, 130202931 + 130202932.

It is an arithmetic number, because the mean of its divisors is an integer number (130202932).

Almost surely, 2^260405863 is an apocalyptic number.

260405863 is a deficient number, since it is larger than the sum of its proper divisors (1).

260405863 is an equidigital number, since it uses as much as digits as its factorization.

260405863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 260405863 is about 16137.0958663571. The cubic root of 260405863 is about 638.5823626574.

The spelling of 260405863 in words is "two hundred sixty million, four hundred five thousand, eight hundred sixty-three".