8999149 has 4 divisors (see below), whose sum is σ = 9081820. Its totient is φ = 8916480.

The previous prime is 8999143. The next prime is 8999161. The reversal of 8999149 is 9419998.

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 6916900 + 2082249 = 2630^2 + 1443^2 .

It is a cyclic number.

It is not a de Polignac number, because 8999149 - 2¹¹ = 8997101 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 (8999143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41172 + ... + 41389.

It is an arithmetic number, because the mean of its divisors is an integer number (2270455).

Almost surely, 2^8999149 is an apocalyptic number.

It is an amenable number.

8999149 is a deficient number, since it is larger than the sum of its proper divisors (82671).

8999149 is a wasteful number, since it uses less digits than its factorization.

8999149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82670.

The product of its digits is 209952, while the sum is 49.

The square root of 8999149 is about 2999.8581633137. The cubic root of 8999149 is about 208.0018259825.

The spelling of 8999149 in words is "eight million, nine hundred ninety-nine thousand, one hundred forty-nine".