8143695973 has 12 divisors (see below), whose sum is σ = 9652023180. Its totient is φ = 6848604672.

The previous prime is 8143695947. The next prime is 8143695983. The reversal of 8143695973 is 3795963418.

It can be written as a sum of positive squares in 2 ways, for example, as 3886524964 + 4257171009 = 62342^2 + 65247^2 .

It is not a de Polignac number, because 8143695973 - 2¹³ = 8143687781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8143695913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1565308 + ... + 1570501.

It is an arithmetic number, because the mean of its divisors is an integer number (804335265).

Almost surely, 2^8143695973 is an apocalyptic number.

It is an amenable number.

8143695973 is a deficient number, since it is larger than the sum of its proper divisors (1508327207).

8143695973 is a wasteful number, since it uses less digits than its factorization.

8143695973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135876 (or 3135869 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 55.

The square root of 8143695973 is about 90242.4288957251. The cubic root of 8143695973 is about 2011.9036751160.

The spelling of 8143695973 in words is "eight billion, one hundred forty-three million, six hundred ninety-five thousand, nine hundred seventy-three".