16673391 has 32 divisors (see below), whose sum is σ = 28846080. Its totient is φ = 9319968.

The previous prime is 16673387. The next prime is 16673401. The reversal of 16673391 is 19337661.

It is not a de Polignac number, because 16673391 - 2² = 16673387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16673491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7945 + ... + 9821.

It is an arithmetic number, because the mean of its divisors is an integer number (901440).

Almost surely, 2^16673391 is an apocalyptic number.

16673391 is a deficient number, since it is larger than the sum of its proper divisors (12172689).

16673391 is a wasteful number, since it uses less digits than its factorization.

16673391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 1934 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 16673391 is about 4083.3063808634. The cubic root of 16673391 is about 255.4708256460.

The spelling of 16673391 in words is "sixteen million, six hundred seventy-three thousand, three hundred ninety-one".