260621069 has 2 divisors, whose sum is σ = 260621070. Its totient is φ = 260621068.

The previous prime is 260621059. The next prime is 260621083. The reversal of 260621069 is 960126062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159719044 + 100902025 = 12638^2 + 10045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260621069 is a prime.

It is a super-2 number, since 2×260621069² = 135846683213405522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260621059) 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, 130310534 + 130310535.

It is an arithmetic number, because the mean of its divisors is an integer number (130310535).

Almost surely, 2^260621069 is an apocalyptic number.

It is an amenable number.

260621069 is a deficient number, since it is larger than the sum of its proper divisors (1).

260621069 is an equidigital number, since it uses as much as digits as its factorization.

260621069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 260621069 is about 16143.7625416134. The cubic root of 260621069 is about 638.7582277654.

The spelling of 260621069 in words is "two hundred sixty million, six hundred twenty-one thousand, sixty-nine".