8217149 has 4 divisors (see below), whose sum is σ = 8235900. Its totient is φ = 8198400.

The previous prime is 8217133. The next prime is 8217169. The reversal of 8217149 is 9417128.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1932100 + 6285049 = 1390^2 + 2507^2 .

It is a cyclic number.

It is not a de Polignac number, because 8217149 - 2⁴ = 8217133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8217169) 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, 8702 + ... + 9599.

It is an arithmetic number, because the mean of its divisors is an integer number (2058975).

Almost surely, 2^8217149 is an apocalyptic number.

It is an amenable number.

8217149 is a deficient number, since it is larger than the sum of its proper divisors (18751).

8217149 is a wasteful number, since it uses less digits than its factorization.

8217149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18750.

The product of its digits is 4032, while the sum is 32.

The square root of 8217149 is about 2866.5569940261. The cubic root of 8217149 is about 201.7934447094.

The spelling of 8217149 in words is "eight million, two hundred seventeen thousand, one hundred forty-nine".