16946149 has 4 divisors (see below), whose sum is σ = 18486720. Its totient is φ = 15405580.

The previous prime is 16946143. The next prime is 16946159. The reversal of 16946149 is 94164961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94164961 = 11 ⋅8560451.

It is a cyclic number.

It is not a de Polignac number, because 16946149 - 2³ = 16946141 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 (16946141) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770269 + ... + 770290.

It is an arithmetic number, because the mean of its divisors is an integer number (4621680).

Almost surely, 2^16946149 is an apocalyptic number.

It is an amenable number.

16946149 is a deficient number, since it is larger than the sum of its proper divisors (1540571).

16946149 is a wasteful number, since it uses less digits than its factorization.

16946149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540570.

The product of its digits is 46656, while the sum is 40.

The square root of 16946149 is about 4116.5700528474. The cubic root of 16946149 is about 256.8563697533.

The spelling of 16946149 in words is "sixteen million, nine hundred forty-six thousand, one hundred forty-nine".