260564189 has 2 divisors, whose sum is σ = 260564190. Its totient is φ = 260564188.

The previous prime is 260564149. The next prime is 260564203. The reversal of 260564189 is 981465062.

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., 260564164 + 25 = 16142^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 260564189 - 2²⁴ = 243786973 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260564149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130282094 + 130282095.

It is an arithmetic number, because the mean of its divisors is an integer number (130282095).

Almost surely, 2^260564189 is an apocalyptic number.

It is an amenable number.

260564189 is a deficient number, since it is larger than the sum of its proper divisors (1).

260564189 is an equidigital number, since it uses as much as digits as its factorization.

260564189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 260564189 is about 16142.0007743774. Note that the first 3 decimals coincide. The cubic root of 260564189 is about 638.7117551713.

The spelling of 260564189 in words is "two hundred sixty million, five hundred sixty-four thousand, one hundred eighty-nine".