264812489 has 2 divisors, whose sum is σ = 264812490. Its totient is φ = 264812488.

The previous prime is 264812459. The next prime is 264812491. The reversal of 264812489 is 984218462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262278025 + 2534464 = 16195^2 + 1592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264812489 is a prime.

Together with 264812491, 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 (264812459) 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, 132406244 + 132406245.

It is an arithmetic number, because the mean of its divisors is an integer number (132406245).

Almost surely, 2^264812489 is an apocalyptic number.

It is an amenable number.

264812489 is a deficient number, since it is larger than the sum of its proper divisors (1).

264812489 is an equidigital number, since it uses as much as digits as its factorization.

264812489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 44.

The square root of 264812489 is about 16273.0602223429. The cubic root of 264812489 is about 642.1642946396.

The spelling of 264812489 in words is "two hundred sixty-four million, eight hundred twelve thousand, four hundred eighty-nine".