64644119 has 2 divisors, whose sum is σ = 64644120. Its totient is φ = 64644118.

The previous prime is 64644101. The next prime is 64644121. The reversal of 64644119 is 91144646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64644119 - 2¹⁶ = 64578583 is a prime.

It is a super-2 number, since 2×64644119² = 8357724242572322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 64644121, 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 (64640119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32322059 + 32322060.

It is an arithmetic number, because the mean of its divisors is an integer number (32322060).

Almost surely, 2^64644119 is an apocalyptic number.

64644119 is a deficient number, since it is larger than the sum of its proper divisors (1).

64644119 is an equidigital number, since it uses as much as digits as its factorization.

64644119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 64644119 is about 8040.1566527027. The cubic root of 64644119 is about 401.3374377500.

The spelling of 64644119 in words is "sixty-four million, six hundred forty-four thousand, one hundred nineteen".