260405867 has 2 divisors, whose sum is σ = 260405868. Its totient is φ = 260405866.

The previous prime is 260405863. The next prime is 260405879. The reversal of 260405867 is 768504062.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260405867 - 2² = 260405863 is a prime.

It is a super-2 number, since 2×260405867² = 135622431136043378, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 260405867.

It is not a weakly prime, because it can be changed into another prime (260405863) 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, 130202933 + 130202934.

It is an arithmetic number, because the mean of its divisors is an integer number (130202934).

Almost surely, 2^260405867 is an apocalyptic number.

260405867 is a deficient number, since it is larger than the sum of its proper divisors (1).

260405867 is an equidigital number, since it uses as much as digits as its factorization.

260405867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 260405867 is about 16137.0959902952. The cubic root of 260405867 is about 638.5823659271.

The spelling of 260405867 in words is "two hundred sixty million, four hundred five thousand, eight hundred sixty-seven".