264605489 has 2 divisors, whose sum is σ = 264605490. Its totient is φ = 264605488.

The previous prime is 264605447. The next prime is 264605503. The reversal of 264605489 is 984506462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160402225 + 104203264 = 12665^2 + 10208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264605489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264605189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132302744 + 132302745.

It is an arithmetic number, because the mean of its divisors is an integer number (132302745).

Almost surely, 2^264605489 is an apocalyptic number.

It is an amenable number.

264605489 is a deficient number, since it is larger than the sum of its proper divisors (1).

264605489 is an equidigital number, since it uses as much as digits as its factorization.

264605489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 264605489 is about 16266.6987738754. The cubic root of 264605489 is about 641.9969275837.

The spelling of 264605489 in words is "two hundred sixty-four million, six hundred five thousand, four hundred eighty-nine".