264888391 has 2 divisors, whose sum is σ = 264888392. Its totient is φ = 264888390.

The previous prime is 264888313. The next prime is 264888427. The reversal of 264888391 is 193888462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264888391 - 2¹³ = 264880199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264888191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132444195 + 132444196.

It is an arithmetic number, because the mean of its divisors is an integer number (132444196).

Almost surely, 2^264888391 is an apocalyptic number.

264888391 is a deficient number, since it is larger than the sum of its proper divisors (1).

264888391 is an equidigital number, since it uses as much as digits as its factorization.

264888391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 49.

The square root of 264888391 is about 16275.3921918951. The cubic root of 264888391 is about 642.2256423230.

The spelling of 264888391 in words is "two hundred sixty-four million, eight hundred eighty-eight thousand, three hundred ninety-one".