260805997 has 2 divisors, whose sum is σ = 260805998. Its totient is φ = 260805996.

The previous prime is 260805953. The next prime is 260806037. The reversal of 260805997 is 799508062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218477961 + 42328036 = 14781^2 + 6506^2 .

It is a cyclic number.

It is not a de Polignac number, because 260805997 - 2⁷ = 260805869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260805907) 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, 130402998 + 130402999.

It is an arithmetic number, because the mean of its divisors is an integer number (130402999).

Almost surely, 2^260805997 is an apocalyptic number.

It is an amenable number.

260805997 is a deficient number, since it is larger than the sum of its proper divisors (1).

260805997 is an equidigital number, since it uses as much as digits as its factorization.

260805997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 260805997 is about 16149.4890631252. The cubic root of 260805997 is about 638.9092725421.

The spelling of 260805997 in words is "two hundred sixty million, eight hundred five thousand, nine hundred ninety-seven".