8144447197 has 4 divisors (see below), whose sum is σ = 8179402140. Its totient is φ = 8109492256.

The previous prime is 8144447153. The next prime is 8144447219. The reversal of 8144447197 is 7917444418.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2451141081 + 5693306116 = 49509^2 + 75454^2 .

It is a cyclic number.

It is not a de Polignac number, because 8144447197 - 2¹⁹ = 8143922909 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 8144447197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8144447107) 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, 17477122 + ... + 17477587.

It is an arithmetic number, because the mean of its divisors is an integer number (2044850535).

Almost surely, 2^8144447197 is an apocalyptic number.

It is an amenable number.

8144447197 is a deficient number, since it is larger than the sum of its proper divisors (34954943).

8144447197 is a wasteful number, since it uses less digits than its factorization.

8144447197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34954942.

The product of its digits is 903168, while the sum is 49.

The square root of 8144447197 is about 90246.5910547318. The cubic root of 8144447197 is about 2011.9655366205.

The spelling of 8144447197 in words is "eight billion, one hundred forty-four million, four hundred forty-seven thousand, one hundred ninety-seven".