264391249 has 2 divisors, whose sum is σ = 264391250. Its totient is φ = 264391248.

The previous prime is 264391199. The next prime is 264391273. The reversal of 264391249 is 942193462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263250625 + 1140624 = 16225^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 264391249 - 2¹⁷ = 264260177 is a prime.

It is not a weakly prime, because it can be changed into another prime (264391549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132195624 + 132195625.

It is an arithmetic number, because the mean of its divisors is an integer number (132195625).

Almost surely, 2^264391249 is an apocalyptic number.

It is an amenable number.

264391249 is a deficient number, since it is larger than the sum of its proper divisors (1).

264391249 is an equidigital number, since it uses as much as digits as its factorization.

264391249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 264391249 is about 16260.1122074849. The cubic root of 264391249 is about 641.8236147781.

The spelling of 264391249 in words is "two hundred sixty-four million, three hundred ninety-one thousand, two hundred forty-nine".