265961317 has 2 divisors, whose sum is σ = 265961318. Its totient is φ = 265961316.

The previous prime is 265961279. The next prime is 265961323. The reversal of 265961317 is 713169562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185123236 + 80838081 = 13606^2 + 8991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265961317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265961317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265961327) 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, 132980658 + 132980659.

It is an arithmetic number, because the mean of its divisors is an integer number (132980659).

Almost surely, 2^265961317 is an apocalyptic number.

It is an amenable number.

265961317 is a deficient number, since it is larger than the sum of its proper divisors (1).

265961317 is an equidigital number, since it uses as much as digits as its factorization.

265961317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 265961317 is about 16308.3204837285. The cubic root of 265961317 is about 643.0915822912.

The spelling of 265961317 in words is "two hundred sixty-five million, nine hundred sixty-one thousand, three hundred seventeen".