265438913 has 2 divisors, whose sum is σ = 265438914. Its totient is φ = 265438912.

The previous prime is 265438909. The next prime is 265438933. The reversal of 265438913 is 319834562.

265438913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235714609 + 29724304 = 15353^2 + 5452^2 .

It is a cyclic number.

It is not a de Polignac number, because 265438913 - 2² = 265438909 is a prime.

It is not a weakly prime, because it can be changed into another prime (265438933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132719456 + 132719457.

It is an arithmetic number, because the mean of its divisors is an integer number (132719457).

Almost surely, 2^265438913 is an apocalyptic number.

It is an amenable number.

265438913 is a deficient number, since it is larger than the sum of its proper divisors (1).

265438913 is an equidigital number, since it uses as much as digits as its factorization.

265438913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 265438913 is about 16292.2961242423. The cubic root of 265438913 is about 642.6702505723.

The spelling of 265438913 in words is "two hundred sixty-five million, four hundred thirty-eight thousand, nine hundred thirteen".