8286213991 has 4 divisors (see below), whose sum is σ = 9039506184. Its totient is φ = 7532921800.

The previous prime is 8286213983. The next prime is 8286213997. The reversal of 8286213991 is 1993126828.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8286213991 - 2³ = 8286213983 is a prime.

It is a super-2 number, since 2×8286213991² (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 (8286213997) 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, 376646080 + ... + 376646101.

It is an arithmetic number, because the mean of its divisors is an integer number (2259876546).

Almost surely, 2^8286213991 is an apocalyptic number.

8286213991 is a deficient number, since it is larger than the sum of its proper divisors (753292193).

8286213991 is a wasteful number, since it uses less digits than its factorization.

8286213991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753292192.

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

The square root of 8286213991 is about 91028.6437941377. The cubic root of 8286213991 is about 2023.5722489610.

The spelling of 8286213991 in words is "eight billion, two hundred eighty-six million, two hundred thirteen thousand, nine hundred ninety-one".