264268391 has 2 divisors, whose sum is σ = 264268392. Its totient is φ = 264268390.

The previous prime is 264268369. The next prime is 264268453. The reversal of 264268391 is 193862462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264268391 - 2⁶ = 264268327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264268691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132134195 + 132134196.

It is an arithmetic number, because the mean of its divisors is an integer number (132134196).

Almost surely, 2^264268391 is an apocalyptic number.

264268391 is a deficient number, since it is larger than the sum of its proper divisors (1).

264268391 is an equidigital number, since it uses as much as digits as its factorization.

264268391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 264268391 is about 16256.3338732938. Note that the first 3 decimals coincide. The cubic root of 264268391 is about 641.7241846306.

The spelling of 264268391 in words is "two hundred sixty-four million, two hundred sixty-eight thousand, three hundred ninety-one".