64943841 has 8 divisors (see below), whose sum is σ = 86641920. Its totient is φ = 43270832.

The previous prime is 64943821. The next prime is 64943873. The reversal of 64943841 is 14834946.

It is a happy number.

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 64943841 - 2⁶ = 64943777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64943841.

It is not an unprimeable number, because it can be changed into a prime (64943821) 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, 976 + ... + 11438.

It is an arithmetic number, because the mean of its divisors is an integer number (10830240).

Almost surely, 2^64943841 is an apocalyptic number.

It is an amenable number.

64943841 is a deficient number, since it is larger than the sum of its proper divisors (21698079).

64943841 is a wasteful number, since it uses less digits than its factorization.

64943841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12535.

The product of its digits is 82944, while the sum is 39.

The square root of 64943841 is about 8058.7741623649. The cubic root of 64943841 is about 401.9567476546.

The spelling of 64943841 in words is "sixty-four million, nine hundred forty-three thousand, eight hundred forty-one".