16672003 has 4 divisors (see below), whose sum is σ = 17059768. Its totient is φ = 16284240.

The previous prime is 16672001. The next prime is 16672009. The reversal of 16672003 is 30027661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30027661 = 17 ⋅1766333.

It is a cyclic number.

It is not a de Polignac number, because 16672003 - 2¹ = 16672001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16672001) 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, 193818 + ... + 193903.

It is an arithmetic number, because the mean of its divisors is an integer number (4264942).

Almost surely, 2^16672003 is an apocalyptic number.

16672003 is a deficient number, since it is larger than the sum of its proper divisors (387765).

16672003 is an equidigital number, since it uses as much as digits as its factorization.

16672003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387764.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 16672003 is about 4083.1364170206. The cubic root of 16672003 is about 255.4637364393.

Adding to 16672003 its reverse (30027661), we get a palindrome (46699664).

The spelling of 16672003 in words is "sixteen million, six hundred seventy-two thousand, three".