64842443 has 8 divisors (see below), whose sum is σ = 66531696. Its totient is φ = 63158400.

The previous prime is 64842439. The next prime is 64842457. The reversal of 64842443 is 34424846.

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 64842443 - 2² = 64842439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64842433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41588 + ... + 43118.

It is an arithmetic number, because the mean of its divisors is an integer number (8316462).

Almost surely, 2^64842443 is an apocalyptic number.

64842443 is a deficient number, since it is larger than the sum of its proper divisors (1689253).

64842443 is a wasteful number, since it uses less digits than its factorization.

64842443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605.

The product of its digits is 73728, while the sum is 35.

The square root of 64842443 is about 8052.4805494953. The cubic root of 64842443 is about 401.7474445606.

The spelling of 64842443 in words is "sixty-four million, eight hundred forty-two thousand, four hundred forty-three".