16673857 has 4 divisors (see below), whose sum is σ = 16902340. Its totient is φ = 16445376.

The previous prime is 16673807. The next prime is 16673863. The reversal of 16673857 is 75837661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75837661 = 311 ⋅243851.

It can be written as a sum of positive squares in 2 ways, for example, as 12609601 + 4064256 = 3551^2 + 2016^2 .

It is a cyclic number.

It is not a de Polignac number, because 16673857 - 2⁷ = 16673729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16673807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114132 + ... + 114277.

It is an arithmetic number, because the mean of its divisors is an integer number (4225585).

Almost surely, 2^16673857 is an apocalyptic number.

It is an amenable number.

16673857 is a deficient number, since it is larger than the sum of its proper divisors (228483).

16673857 is an equidigital number, since it uses as much as digits as its factorization.

16673857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228482.

The product of its digits is 211680, while the sum is 43.

The square root of 16673857 is about 4083.3634420659. The cubic root of 16673857 is about 255.4732056516.

The spelling of 16673857 in words is "sixteen million, six hundred seventy-three thousand, eight hundred fifty-seven".