9218149 has 4 divisors (see below), whose sum is σ = 9269260. Its totient is φ = 9167040.

The previous prime is 9218141. The next prime is 9218161. The reversal of 9218149 is 9418129.

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 260100 + 8958049 = 510^2 + 2993^2 .

It is a cyclic number.

It is not a de Polignac number, because 9218149 - 2³ = 9218141 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

9218149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9218141) 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, 25284 + ... + 25645.

It is an arithmetic number, because the mean of its divisors is an integer number (2317315).

Almost surely, 2^9218149 is an apocalyptic number.

It is an amenable number.

9218149 is a deficient number, since it is larger than the sum of its proper divisors (51111).

9218149 is a wasteful number, since it uses less digits than its factorization.

9218149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51110.

The product of its digits is 5184, while the sum is 34.

The square root of 9218149 is about 3036.1404776459. The cubic root of 9218149 is about 209.6756064891.

The spelling of 9218149 in words is "nine million, two hundred eighteen thousand, one hundred forty-nine".