64328489 has 2 divisors, whose sum is σ = 64328490. Its totient is φ = 64328488.

The previous prime is 64328479. The next prime is 64328491. The reversal of 64328489 is 98482346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47844889 + 16483600 = 6917^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 64328489 - 2¹⁶ = 64262953 is a prime.

Together with 64328491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64328449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32164244 + 32164245.

It is an arithmetic number, because the mean of its divisors is an integer number (32164245).

Almost surely, 2^64328489 is an apocalyptic number.

It is an amenable number.

64328489 is a deficient number, since it is larger than the sum of its proper divisors (1).

64328489 is an equidigital number, since it uses as much as digits as its factorization.

64328489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 44.

The square root of 64328489 is about 8020.5042858913. The cubic root of 64328489 is about 400.6831845661.

The spelling of 64328489 in words is "sixty-four million, three hundred twenty-eight thousand, four hundred eighty-nine".