64441189 has 2 divisors, whose sum is σ = 64441190. Its totient is φ = 64441188.

The previous prime is 64441187. The next prime is 64441211. The reversal of 64441189 is 98114446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60372900 + 4068289 = 7770^2 + 2017^2 .

It is a cyclic number.

It is not a de Polignac number, because 64441189 - 2¹ = 64441187 is a prime.

Together with 64441187, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64441187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32220594 + 32220595.

It is an arithmetic number, because the mean of its divisors is an integer number (32220595).

Almost surely, 2^64441189 is an apocalyptic number.

It is an amenable number.

64441189 is a deficient number, since it is larger than the sum of its proper divisors (1).

64441189 is an equidigital number, since it uses as much as digits as its factorization.

64441189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 64441189 is about 8027.5269541746. The cubic root of 64441189 is about 400.9170397386.

The spelling of 64441189 in words is "sixty-four million, four hundred forty-one thousand, one hundred eighty-nine".