8391883389 has 4 divisors (see below), whose sum is σ = 11189177856. Its totient is φ = 5594588924.

The previous prime is 8391883343. The next prime is 8391883393. The reversal of 8391883389 is 9833881938.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8391883389 - 2²⁸ = 8123447933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8391881389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398647229 + ... + 1398647234.

It is an arithmetic number, because the mean of its divisors is an integer number (2797294464).

Almost surely, 2^8391883389 is an apocalyptic number.

It is an amenable number.

8391883389 is a deficient number, since it is larger than the sum of its proper divisors (2797294467).

8391883389 is a wasteful number, since it uses less digits than its factorization.

8391883389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797294466.

The product of its digits is 8957952, while the sum is 60.

The square root of 8391883389 is about 91607.2234542670. The cubic root of 8391883389 is about 2032.1377650263.

It can be divided in two parts, 8391 and 883389, that added together give a triangular number (891780 = T₁₃₃₅).

The spelling of 8391883389 in words is "eight billion, three hundred ninety-one million, eight hundred eighty-three thousand, three hundred eighty-nine".