264356689 has 2 divisors, whose sum is σ = 264356690. Its totient is φ = 264356688.

The previous prime is 264356621. The next prime is 264356711. The reversal of 264356689 is 986653462.

264356689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263510289 + 846400 = 16233^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 264356689 - 2¹⁵ = 264323921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (264354689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132178344 + 132178345.

It is an arithmetic number, because the mean of its divisors is an integer number (132178345).

Almost surely, 2^264356689 is an apocalyptic number.

It is an amenable number.

264356689 is a deficient number, since it is larger than the sum of its proper divisors (1).

264356689 is an equidigital number, since it uses as much as digits as its factorization.

264356689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 49.

The square root of 264356689 is about 16259.0494494604. The cubic root of 264356689 is about 641.7956481557.

It can be divided in two parts, 26435 and 6689, that added together give a square (33124 = 182²).

The spelling of 264356689 in words is "two hundred sixty-four million, three hundred fifty-six thousand, six hundred eighty-nine".