265489163 has 2 divisors, whose sum is σ = 265489164. Its totient is φ = 265489162.

The previous prime is 265489139. The next prime is 265489183. The reversal of 265489163 is 361984562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265489163 - 2⁶ = 265489099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (265489183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132744581 + 132744582.

It is an arithmetic number, because the mean of its divisors is an integer number (132744582).

Almost surely, 2^265489163 is an apocalyptic number.

265489163 is a deficient number, since it is larger than the sum of its proper divisors (1).

265489163 is an equidigital number, since it uses as much as digits as its factorization.

265489163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 44.

The square root of 265489163 is about 16293.8381911691. The cubic root of 265489163 is about 642.7108024544.

The spelling of 265489163 in words is "two hundred sixty-five million, four hundred eighty-nine thousand, one hundred sixty-three".