8409318891 has 8 divisors (see below), whose sum is σ = 11219039184. Its totient is φ = 5602905600.

The previous prime is 8409318859. The next prime is 8409318961. The reversal of 8409318891 is 1988139048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8409318891 - 2⁵ = 8409318859 is a prime.

It is a super-4 number, since 4×8409318891⁴ (a number of 41 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (8409318691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820810 + ... + 830991.

It is an arithmetic number, because the mean of its divisors is an integer number (1402379898).

Almost surely, 2^8409318891 is an apocalyptic number.

8409318891 is a deficient number, since it is larger than the sum of its proper divisors (2809720293).

8409318891 is a wasteful number, since it uses less digits than its factorization.

8409318891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653501.

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 8409318891 is about 91702.3385252525. The cubic root of 8409318891 is about 2033.5441569960.

The spelling of 8409318891 in words is "eight billion, four hundred nine million, three hundred eighteen thousand, eight hundred ninety-one".