8393814991 has 8 divisors (see below), whose sum is σ = 9009317664. Its totient is φ = 7791840000.

The previous prime is 8393814973. The next prime is 8393815039. The reversal of 8393814991 is 1994183938.

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

It is a cyclic number.

It is not a de Polignac number, because 8393814991 - 2²³ = 8385426383 is a prime.

It is a super-2 number, since 2×8393814991² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8393814791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3380635 + ... + 3383116.

It is an arithmetic number, because the mean of its divisors is an integer number (1126164708).

Almost surely, 2^8393814991 is an apocalyptic number.

8393814991 is a deficient number, since it is larger than the sum of its proper divisors (615502673).

8393814991 is a wasteful number, since it uses less digits than its factorization.

8393814991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763841.

The product of its digits is 1679616, while the sum is 55.

The square root of 8393814991 is about 91617.7656953061. The cubic root of 8393814991 is about 2032.2936688547.

The spelling of 8393814991 in words is "eight billion, three hundred ninety-three million, eight hundred fourteen thousand, nine hundred ninety-one".