264136591 has 2 divisors, whose sum is σ = 264136592. Its totient is φ = 264136590.

The previous prime is 264136589. The next prime is 264136619. The reversal of 264136591 is 195631462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264136591 - 2¹ = 264136589 is a prime.

Together with 264136589, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 264136591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264136501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132068295 + 132068296.

It is an arithmetic number, because the mean of its divisors is an integer number (132068296).

Almost surely, 2^264136591 is an apocalyptic number.

264136591 is a deficient number, since it is larger than the sum of its proper divisors (1).

264136591 is an equidigital number, since it uses as much as digits as its factorization.

264136591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 264136591 is about 16252.2795631874. The cubic root of 264136591 is about 641.6174833688.

The spelling of 264136591 in words is "two hundred sixty-four million, one hundred thirty-six thousand, five hundred ninety-one".