64189369 has 2 divisors, whose sum is σ = 64189370. Its totient is φ = 64189368.

The previous prime is 64189351. The next prime is 64189397. The reversal of 64189369 is 96398146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55308969 + 8880400 = 7437^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 64189369 - 2⁹ = 64188857 is a prime.

It is a super-2 number, since 2×64189369² = 8240550185236322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64189309) 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, 32094684 + 32094685.

It is an arithmetic number, because the mean of its divisors is an integer number (32094685).

Almost surely, 2^64189369 is an apocalyptic number.

It is an amenable number.

64189369 is a deficient number, since it is larger than the sum of its proper divisors (1).

64189369 is an equidigital number, since it uses as much as digits as its factorization.

64189369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 64189369 is about 8011.8268203950. The cubic root of 64189369 is about 400.3941302758.

The spelling of 64189369 in words is "sixty-four million, one hundred eighty-nine thousand, three hundred sixty-nine".