64441939 has 8 divisors (see below), whose sum is σ = 68507280. Its totient is φ = 60444000.

The previous prime is 64441933. The next prime is 64441961. The reversal of 64441939 is 93914446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64441939 - 2⁹ = 64441427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64441933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14872 + ... + 18709.

It is an arithmetic number, because the mean of its divisors is an integer number (8563410).

Almost surely, 2^64441939 is an apocalyptic number.

64441939 is a deficient number, since it is larger than the sum of its proper divisors (4065341).

64441939 is a wasteful number, since it uses less digits than its factorization.

64441939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33701.

The product of its digits is 93312, while the sum is 40.

The square root of 64441939 is about 8027.5736683010. The cubic root of 64441939 is about 400.9185950928.

The spelling of 64441939 in words is "sixty-four million, four hundred forty-one thousand, nine hundred thirty-nine".