265506379 has 2 divisors, whose sum is σ = 265506380. Its totient is φ = 265506378.

The previous prime is 265506341. The next prime is 265506383. The reversal of 265506379 is 973605562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265506379 - 2⁷ = 265506251 is a prime.

It is not a weakly prime, because it can be changed into another prime (265506079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132753189 + 132753190.

It is an arithmetic number, because the mean of its divisors is an integer number (132753190).

Almost surely, 2^265506379 is an apocalyptic number.

265506379 is a deficient number, since it is larger than the sum of its proper divisors (1).

265506379 is an equidigital number, since it uses as much as digits as its factorization.

265506379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 43.

The square root of 265506379 is about 16294.3664804742. The cubic root of 265506379 is about 642.7246946347.

The spelling of 265506379 in words is "two hundred sixty-five million, five hundred six thousand, three hundred seventy-nine".