64444423 has 2 divisors, whose sum is σ = 64444424. Its totient is φ = 64444422.

The previous prime is 64444421. The next prime is 64444427. The reversal of 64444423 is 32444446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64444423 - 2¹ = 64444421 is a prime.

Together with 64444421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64444421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32222211 + 32222212.

It is an arithmetic number, because the mean of its divisors is an integer number (32222212).

Almost surely, 2^64444423 is an apocalyptic number.

64444423 is a deficient number, since it is larger than the sum of its proper divisors (1).

64444423 is an equidigital number, since it uses as much as digits as its factorization.

64444423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 31.

The square root of 64444423 is about 8027.7283835466. The cubic root of 64444423 is about 400.9237463396.

Adding to 64444423 its reverse (32444446), we get a palindrome (96888869).

The spelling of 64444423 in words is "sixty-four million, four hundred forty-four thousand, four hundred twenty-three".