16986149 has 4 divisors (see below), whose sum is σ = 17100300. Its totient is φ = 16872000.

The previous prime is 16986139. The next prime is 16986173. The reversal of 16986149 is 94168961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94168961 = 1009 ⋅93329.

It can be written as a sum of positive squares in 2 ways, for example, as 6630625 + 10355524 = 2575^2 + 3218^2 .

It is a cyclic number.

It is not a de Polignac number, because 16986149 - 2⁸ = 16985893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16986139) 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, 56852 + ... + 57149.

It is an arithmetic number, because the mean of its divisors is an integer number (4275075).

Almost surely, 2^16986149 is an apocalyptic number.

It is an amenable number.

16986149 is a deficient number, since it is larger than the sum of its proper divisors (114151).

16986149 is a wasteful number, since it uses less digits than its factorization.

16986149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114150.

The product of its digits is 93312, while the sum is 44.

The square root of 16986149 is about 4121.4256028709. The cubic root of 16986149 is about 257.0583071085.

The spelling of 16986149 in words is "sixteen million, nine hundred eighty-six thousand, one hundred forty-nine".