264405289 has 2 divisors, whose sum is σ = 264405290. Its totient is φ = 264405288.

The previous prime is 264405257. The next prime is 264405313. The reversal of 264405289 is 982504462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264387600 + 17689 = 16260^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 264405289 - 2⁵ = 264405257 is a prime.

It is not a weakly prime, because it can be changed into another prime (264405689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132202644 + 132202645.

It is an arithmetic number, because the mean of its divisors is an integer number (132202645).

Almost surely, 2^264405289 is an apocalyptic number.

It is an amenable number.

264405289 is a deficient number, since it is larger than the sum of its proper divisors (1).

264405289 is an equidigital number, since it uses as much as digits as its factorization.

264405289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 264405289 is about 16260.5439330915. The cubic root of 264405289 is about 641.8349755224.

The spelling of 264405289 in words is "two hundred sixty-four million, four hundred five thousand, two hundred eighty-nine".