8197131694 has 4 divisors (see below), whose sum is σ = 12295697544. Its totient is φ = 4098565846.

The previous prime is 8197131629. The next prime is 8197131779. The reversal of 8197131694 is 4961317918.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2049282922 + ... + 2049282925.

It is an arithmetic number, because the mean of its divisors is an integer number (3073924386).

Almost surely, 2^8197131694 is an apocalyptic number.

8197131694 is a deficient number, since it is larger than the sum of its proper divisors (4098565850).

8197131694 is a wasteful number, since it uses less digits than its factorization.

8197131694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098565849.

The product of its digits is 326592, while the sum is 49.

The square root of 8197131694 is about 90538.0124257209. The cubic root of 8197131694 is about 2016.2945248644.

The spelling of 8197131694 in words is "eight billion, one hundred ninety-seven million, one hundred thirty-one thousand, six hundred ninety-four".