8291213 has 4 divisors (see below), whose sum is σ = 9475680. Its totient is φ = 7106748.

The previous prime is 8291209. The next prime is 8291221. The reversal of 8291213 is 3121928.

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 8291213 - 2² = 8291209 is a prime.

It is a super-2 number, since 2×8291213² = 137488426022738, which 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 (8291233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592223 + ... + 592236.

It is an arithmetic number, because the mean of its divisors is an integer number (2368920).

Almost surely, 2^8291213 is an apocalyptic number.

It is an amenable number.

8291213 is a deficient number, since it is larger than the sum of its proper divisors (1184467).

8291213 is a wasteful number, since it uses less digits than its factorization.

8291213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184466.

The product of its digits is 864, while the sum is 26.

The square root of 8291213 is about 2879.4466482295. The cubic root of 8291213 is about 202.3979102332.

The spelling of 8291213 in words is "eight million, two hundred ninety-one thousand, two hundred thirteen".