265864013 has 2 divisors, whose sum is σ = 265864014. Its totient is φ = 265864012.

The previous prime is 265863977. The next prime is 265864031. The reversal of 265864013 is 310468562.

Together with next prime (265864031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205692964 + 60171049 = 14342^2 + 7757^2 .

It is a cyclic number.

It is not a de Polignac number, because 265864013 - 2⁸ = 265863757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265864033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132932006 + 132932007.

It is an arithmetic number, because the mean of its divisors is an integer number (132932007).

Almost surely, 2^265864013 is an apocalyptic number.

It is an amenable number.

265864013 is a deficient number, since it is larger than the sum of its proper divisors (1).

265864013 is an equidigital number, since it uses as much as digits as its factorization.

265864013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 265864013 is about 16305.3369483737. The cubic root of 265864013 is about 643.0131460524.

The spelling of 265864013 in words is "two hundred sixty-five million, eight hundred sixty-four thousand, thirteen".