265345813 has 2 divisors, whose sum is σ = 265345814. Its totient is φ = 265345812.

The previous prime is 265345789. The next prime is 265345823. The reversal of 265345813 is 318543562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257827249 + 7518564 = 16057^2 + 2742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265345813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265345823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132672906 + 132672907.

It is an arithmetic number, because the mean of its divisors is an integer number (132672907).

Almost surely, 2^265345813 is an apocalyptic number.

It is an amenable number.

265345813 is a deficient number, since it is larger than the sum of its proper divisors (1).

265345813 is an equidigital number, since it uses as much as digits as its factorization.

265345813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 37.

The square root of 265345813 is about 16289.4386950564. The cubic root of 265345813 is about 642.5951051007.

The spelling of 265345813 in words is "two hundred sixty-five million, three hundred forty-five thousand, eight hundred thirteen".