8419643943 has 16 divisors (see below), whose sum is σ = 11377889280. Its totient is φ = 5537742336.

The previous prime is 8419643933. The next prime is 8419643951. The reversal of 8419643943 is 3493469148.

It is a happy number.

It is not a de Polignac number, because 8419643943 - 2¹² = 8419639847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8419643923) 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 15 ways as a sum of consecutive naturals, for example, 6471 + ... + 129927.

It is an arithmetic number, because the mean of its divisors is an integer number (711118080).

Almost surely, 2^8419643943 is an apocalyptic number.

8419643943 is a deficient number, since it is larger than the sum of its proper divisors (2958245337).

8419643943 is a wasteful number, since it uses less digits than its factorization.

8419643943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123766.

The product of its digits is 2239488, while the sum is 51.

The square root of 8419643943 is about 91758.6178132605. The cubic root of 8419643943 is about 2034.3760857198.

The spelling of 8419643943 in words is "eight billion, four hundred nineteen million, six hundred forty-three thousand, nine hundred forty-three".