264665189 has 8 divisors (see below), whose sum is σ = 268074840. Its totient is φ = 261273600.

The previous prime is 264665183. The next prime is 264665201. The reversal of 264665189 is 981566462.

It can be written as a sum of positive squares in 4 ways, for example, as 19492225 + 245172964 = 4415^2 + 15658^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264665189 - 2²⁴ = 247887973 is a prime.

It is a super-3 number, since 3×264665189³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264665183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26309 + ... + 34949.

It is an arithmetic number, because the mean of its divisors is an integer number (33509355).

Almost surely, 2^264665189 is an apocalyptic number.

It is an amenable number.

264665189 is a deficient number, since it is larger than the sum of its proper divisors (3409651).

264665189 is a wasteful number, since it uses less digits than its factorization.

264665189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031.

The product of its digits is 622080, while the sum is 47.

The square root of 264665189 is about 16268.5337077439. The cubic root of 264665189 is about 642.0452061671.

The spelling of 264665189 in words is "two hundred sixty-four million, six hundred sixty-five thousand, one hundred eighty-nine".