64444379 has 4 divisors (see below), whose sum is σ = 65815584. Its totient is φ = 63073176.

The previous prime is 64444361. The next prime is 64444421. The reversal of 64444379 is 97344446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97344446 = 2 ⋅48672223.

It is a cyclic number.

It is not a de Polignac number, because 64444379 - 2¹² = 64440283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64444339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685532 + ... + 685625.

It is an arithmetic number, because the mean of its divisors is an integer number (16453896).

Almost surely, 2^64444379 is an apocalyptic number.

64444379 is a deficient number, since it is larger than the sum of its proper divisors (1371205).

64444379 is a wasteful number, since it uses less digits than its factorization.

64444379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371204.

The product of its digits is 290304, while the sum is 41.

The square root of 64444379 is about 8027.7256430449. The cubic root of 64444379 is about 400.9236550948.

It can be divided in two parts, 6444437 and 9, that added together give a palindrome (6444446).

The spelling of 64444379 in words is "sixty-four million, four hundred forty-four thousand, three hundred seventy-nine".