8214391 has 4 divisors (see below), whose sum is σ = 8414784. Its totient is φ = 8014000.

The previous prime is 8214389. The next prime is 8214439. The reversal of 8214391 is 1934128.

It is a happy number.

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 8214391 - 2¹ = 8214389 is a prime.

It is a Duffinian number.

8214391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8214301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100135 + ... + 100216.

It is an arithmetic number, because the mean of its divisors is an integer number (2103696).

Almost surely, 2^8214391 is an apocalyptic number.

8214391 is a deficient number, since it is larger than the sum of its proper divisors (200393).

8214391 is a wasteful number, since it uses less digits than its factorization.

8214391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200392.

The product of its digits is 1728, while the sum is 28.

The square root of 8214391 is about 2866.0758887371. The cubic root of 8214391 is about 201.7708655643.

The spelling of 8214391 in words is "eight million, two hundred fourteen thousand, three hundred ninety-one".