8391159122 has 4 divisors (see below), whose sum is σ = 12586738686. Its totient is φ = 4195579560.

The previous prime is 8391159103. The next prime is 8391159131. The reversal of 8391159122 is 2219511938.

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., 6111956041 + 2279203081 = 78179^2 + 47741^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8391159122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097789779 + ... + 2097789782.

Almost surely, 2^8391159122 is an apocalyptic number.

8391159122 is a deficient number, since it is larger than the sum of its proper divisors (4195579564).

8391159122 is a wasteful number, since it uses less digits than its factorization.

8391159122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195579563.

The product of its digits is 38880, while the sum is 41.

The square root of 8391159122 is about 91603.2702582173. The cubic root of 8391159122 is about 2032.0793016835.

The spelling of 8391159122 in words is "eight billion, three hundred ninety-one million, one hundred fifty-nine thousand, one hundred twenty-two".