264648991 has 2 divisors, whose sum is σ = 264648992. Its totient is φ = 264648990.

The previous prime is 264648947. The next prime is 264649001. The reversal of 264648991 is 199846462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264648991 - 2⁹ = 264648479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264648931) 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, 132324495 + 132324496.

It is an arithmetic number, because the mean of its divisors is an integer number (132324496).

Almost surely, 2^264648991 is an apocalyptic number.

264648991 is a deficient number, since it is larger than the sum of its proper divisors (1).

264648991 is an equidigital number, since it uses as much as digits as its factorization.

264648991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 49.

The square root of 264648991 is about 16268.0358679221. The cubic root of 264648991 is about 642.0321077811.

The spelling of 264648991 in words is "two hundred sixty-four million, six hundred forty-eight thousand, nine hundred ninety-one".