8137321394 has 4 divisors (see below), whose sum is σ = 12205982094. Its totient is φ = 4068660696.

The previous prime is 8137321369. The next prime is 8137321403. The reversal of 8137321394 is 4931237318.

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

It can be written as a sum of positive squares in only one way, i.e., 7737841225 + 399480169 = 87965^2 + 19987^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2034330347 + ... + 2034330350.

Almost surely, 2^8137321394 is an apocalyptic number.

8137321394 is a deficient number, since it is larger than the sum of its proper divisors (4068660700).

8137321394 is a wasteful number, since it uses less digits than its factorization.

8137321394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068660699.

The product of its digits is 108864, while the sum is 41.

The square root of 8137321394 is about 90207.1027912991. The cubic root of 8137321394 is about 2011.3785905706.

The spelling of 8137321394 in words is "eight billion, one hundred thirty-seven million, three hundred twenty-one thousand, three hundred ninety-four".