265440893 has 2 divisors, whose sum is σ = 265440894. Its totient is φ = 265440892.

The previous prime is 265440881. The next prime is 265440943. The reversal of 265440893 is 398044562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255936004 + 9504889 = 15998^2 + 3083^2 .

It is a cyclic number.

It is not a de Polignac number, because 265440893 - 2¹⁰ = 265439869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 265440893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265440863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132720446 + 132720447.

It is an arithmetic number, because the mean of its divisors is an integer number (132720447).

Almost surely, 2^265440893 is an apocalyptic number.

It is an amenable number.

265440893 is a deficient number, since it is larger than the sum of its proper divisors (1).

265440893 is an equidigital number, since it uses as much as digits as its factorization.

265440893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 265440893 is about 16292.3568890446. The cubic root of 265440893 is about 642.6718485344.

The spelling of 265440893 in words is "two hundred sixty-five million, four hundred forty thousand, eight hundred ninety-three".