8391289612 has 6 divisors (see below), whose sum is σ = 14684756828. Its totient is φ = 4195644804.

The previous prime is 8391289601. The next prime is 8391289633. The reversal of 8391289612 is 2169821938.

It is a super-2 number, since 2×8391289612² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1048911198 + ... + 1048911205.

Almost surely, 2^8391289612 is an apocalyptic number.

It is an amenable number.

8391289612 is a deficient number, since it is larger than the sum of its proper divisors (6293467216).

8391289612 is a wasteful number, since it uses less digits than its factorization.

8391289612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097822407 (or 2097822405 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 8391289612 is about 91603.9825116790. The cubic root of 8391289612 is about 2032.0898351767.

The spelling of 8391289612 in words is "eight billion, three hundred ninety-one million, two hundred eighty-nine thousand, six hundred twelve".