8091213 has 12 divisors (see below), whose sum is σ = 11682720. Its totient is φ = 4978896.

The previous prime is 8091173. The next prime is 8091221. The reversal of 8091213 is 3121908.

It is not a de Polignac number, because 8091213 - 2⁹ = 8090701 is a prime.

It is a super-2 number, since 2×8091213² = 130935455622738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8091913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7473 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (973560).

Almost surely, 2^8091213 is an apocalyptic number.

It is an amenable number.

8091213 is a deficient number, since it is larger than the sum of its proper divisors (3591507).

8091213 is a wasteful number, since it uses less digits than its factorization.

8091213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15988 (or 15975 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 8091213 is about 2844.5057567177. The cubic root of 8091213 is about 200.7572376705.

The spelling of 8091213 in words is "eight million, ninety-one thousand, two hundred thirteen".