64443107 has 4 divisors (see below), whose sum is σ = 68233896. Its totient is φ = 60652320.

The previous prime is 64443097. The next prime is 64443131. The reversal of 64443107 is 70134446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70134446 = 2 ⋅35067223.

It is a cyclic number.

It is not a de Polignac number, because 64443107 - 2¹⁴ = 64426723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64443107.

It is not an unprimeable number, because it can be changed into a prime (64443167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895369 + ... + 1895402.

It is an arithmetic number, because the mean of its divisors is an integer number (17058474).

Almost surely, 2^64443107 is an apocalyptic number.

64443107 is a deficient number, since it is larger than the sum of its proper divisors (3790789).

64443107 is a wasteful number, since it uses less digits than its factorization.

64443107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790788.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 64443107 is about 8027.6464172259. The cubic root of 64443107 is about 400.9210172736.

The spelling of 64443107 in words is "sixty-four million, four hundred forty-three thousand, one hundred seven".