64422409 has 2 divisors, whose sum is σ = 64422410. Its totient is φ = 64422408.

The previous prime is 64422377. The next prime is 64422451. The reversal of 64422409 is 90422446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60918025 + 3504384 = 7805^2 + 1872^2 .

It is a cyclic number.

It is not a de Polignac number, because 64422409 - 2⁵ = 64422377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64422499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32211204 + 32211205.

It is an arithmetic number, because the mean of its divisors is an integer number (32211205).

Almost surely, 2^64422409 is an apocalyptic number.

It is an amenable number.

64422409 is a deficient number, since it is larger than the sum of its proper divisors (1).

64422409 is an equidigital number, since it uses as much as digits as its factorization.

64422409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 64422409 is about 8026.3571438106. The cubic root of 64422409 is about 400.8780897355.

The spelling of 64422409 in words is "sixty-four million, four hundred twenty-two thousand, four hundred nine".