16003073 has 4 divisors (see below), whose sum is σ = 16845360. Its totient is φ = 15160788.

The previous prime is 16003067. The next prime is 16003081. The reversal of 16003073 is 37030061.

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: 37030061 = 2719 ⋅13619.

It is a cyclic number.

It is not a de Polignac number, because 16003073 - 2¹² = 15998977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16003093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421115 + ... + 421152.

It is an arithmetic number, because the mean of its divisors is an integer number (4211340).

It is a Proth number, since it is equal to 3907 ⋅ 2¹² + 1 and 3907 < 2¹².

Almost surely, 2^16003073 is an apocalyptic number.

It is an amenable number.

16003073 is a deficient number, since it is larger than the sum of its proper divisors (842287).

16003073 is an equidigital number, since it uses as much as digits as its factorization.

16003073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842286.

The product of its (nonzero) digits is 378, while the sum is 20.

The square root of 16003073 is about 4000.3841065578. The cubic root of 16003073 is about 252.0003411854. Note that the first 3 decimals are identical.

The spelling of 16003073 in words is "sixteen million, three thousand, seventy-three".