16673945 has 4 divisors (see below), whose sum is σ = 20008740. Its totient is φ = 13339152.

The previous prime is 16673929. The next prime is 16673971. The reversal of 16673945 is 54937661.

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 2917264 + 13756681 = 1708^2 + 3709^2 .

It is a cyclic number.

It is not a de Polignac number, because 16673945 - 2⁴ = 16673929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1667390 + ... + 1667399.

It is an arithmetic number, because the mean of its divisors is an integer number (5002185).

Almost surely, 2^16673945 is an apocalyptic number.

It is an amenable number.

16673945 is a deficient number, since it is larger than the sum of its proper divisors (3334795).

16673945 is an equidigital number, since it uses as much as digits as its factorization.

16673945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334794.

The product of its digits is 136080, while the sum is 41.

The square root of 16673945 is about 4083.3742174824. The cubic root of 16673945 is about 255.4736550898.

The spelling of 16673945 in words is "sixteen million, six hundred seventy-three thousand, nine hundred forty-five".