260760781 has 2 divisors, whose sum is σ = 260760782. Its totient is φ = 260760780.

The previous prime is 260760743. The next prime is 260760811. The reversal of 260760781 is 187067062.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252523881 + 8236900 = 15891^2 + 2870^2 .

It is a cyclic number.

It is not a de Polignac number, because 260760781 - 2¹³ = 260752589 is a prime.

It is a super-2 number, since 2×260760781² = 135992369815459922, 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 260760781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260760701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130380390 + 130380391.

It is an arithmetic number, because the mean of its divisors is an integer number (130380391).

Almost surely, 2^260760781 is an apocalyptic number.

It is an amenable number.

260760781 is a deficient number, since it is larger than the sum of its proper divisors (1).

260760781 is an equidigital number, since it uses as much as digits as its factorization.

260760781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 260760781 is about 16148.0890819936. The cubic root of 260760781 is about 638.8723477888.

The spelling of 260760781 in words is "two hundred sixty million, seven hundred sixty thousand, seven hundred eighty-one".