15996973 has 4 divisors (see below), whose sum is σ = 16005600. Its totient is φ = 15988348.

The previous prime is 15996971. The next prime is 15996997. The reversal of 15996973 is 37969951.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 37969951 = 257 ⋅147743.

It is a cyclic number.

It is not a de Polignac number, because 15996973 - 2¹ = 15996971 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15996971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265 + ... + 5662.

It is an arithmetic number, because the mean of its divisors is an integer number (4001400).

Almost surely, 2^15996973 is an apocalyptic number.

It is an amenable number.

15996973 is a deficient number, since it is larger than the sum of its proper divisors (8627).

15996973 is an equidigital number, since it uses as much as digits as its factorization.

15996973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626.

The product of its digits is 459270, while the sum is 49.

The square root of 15996973 is about 3999.6216071024. The cubic root of 15996973 is about 251.9683182225.

The spelling of 15996973 in words is "fifteen million, nine hundred ninety-six thousand, nine hundred seventy-three".