265748009 has 2 divisors, whose sum is σ = 265748010. Its totient is φ = 265748008.

The previous prime is 265747969. The next prime is 265748047. The reversal of 265748009 is 900847562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199374400 + 66373609 = 14120^2 + 8147^2 .

It is a cyclic number.

It is not a de Polignac number, because 265748009 - 2²⁴ = 248970793 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (265748209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132874004 + 132874005.

It is an arithmetic number, because the mean of its divisors is an integer number (132874005).

Almost surely, 2^265748009 is an apocalyptic number.

It is an amenable number.

265748009 is a deficient number, since it is larger than the sum of its proper divisors (1).

265748009 is an equidigital number, since it uses as much as digits as its factorization.

265748009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 265748009 is about 16301.7793200620. The cubic root of 265748009 is about 642.9196108303.

The spelling of 265748009 in words is "two hundred sixty-five million, seven hundred forty-eight thousand, nine".