64430449 has 2 divisors, whose sum is σ = 64430450. Its totient is φ = 64430448.

The previous prime is 64430447. The next prime is 64430473. The reversal of 64430449 is 94403446.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61074225 + 3356224 = 7815^2 + 1832^2 .

It is a cyclic number.

It is not a de Polignac number, because 64430449 - 2¹ = 64430447 is a prime.

Together with 64430447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64430447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32215224 + 32215225.

It is an arithmetic number, because the mean of its divisors is an integer number (32215225).

Almost surely, 2^64430449 is an apocalyptic number.

It is an amenable number.

64430449 is a deficient number, since it is larger than the sum of its proper divisors (1).

64430449 is an equidigital number, since it uses as much as digits as its factorization.

64430449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 64430449 is about 8026.8579780634. The cubic root of 64430449 is about 400.8947657433.

The spelling of 64430449 in words is "sixty-four million, four hundred thirty thousand, four hundred forty-nine".