265388791 has 2 divisors, whose sum is σ = 265388792. Its totient is φ = 265388790.

The previous prime is 265388771. The next prime is 265388797. The reversal of 265388791 is 197883562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265388791 - 2⁵ = 265388759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265388797) 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, 132694395 + 132694396.

It is an arithmetic number, because the mean of its divisors is an integer number (132694396).

Almost surely, 2^265388791 is an apocalyptic number.

265388791 is a deficient number, since it is larger than the sum of its proper divisors (1).

265388791 is an equidigital number, since it uses as much as digits as its factorization.

265388791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 265388791 is about 16290.7578399533. The cubic root of 265388791 is about 642.6297968880.

The spelling of 265388791 in words is "two hundred sixty-five million, three hundred eighty-eight thousand, seven hundred ninety-one".