264870491 has 2 divisors, whose sum is σ = 264870492. Its totient is φ = 264870490.

The previous prime is 264870467. The next prime is 264870493. The reversal of 264870491 is 194078462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264870491 - 2¹⁸ = 264608347 is a prime.

Together with 264870493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264870493) 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, 132435245 + 132435246.

It is an arithmetic number, because the mean of its divisors is an integer number (132435246).

Almost surely, 2^264870491 is an apocalyptic number.

264870491 is a deficient number, since it is larger than the sum of its proper divisors (1).

264870491 is an equidigital number, since it uses as much as digits as its factorization.

264870491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 264870491 is about 16274.8422726612. The cubic root of 264870491 is about 642.2111757296.

The spelling of 264870491 in words is "two hundred sixty-four million, eight hundred seventy thousand, four hundred ninety-one".