16728473 has 4 divisors (see below), whose sum is σ = 16737408. Its totient is φ = 16719540.

The previous prime is 16728469. The next prime is 16728479. The reversal of 16728473 is 37482761.

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: 37482761 = 29 ⋅1292509.

It is a cyclic number.

It is not a de Polignac number, because 16728473 - 2² = 16728469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16728479) 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, 461 + ... + 5802.

It is an arithmetic number, because the mean of its divisors is an integer number (4184352).

Almost surely, 2^16728473 is an apocalyptic number.

It is an amenable number.

16728473 is a deficient number, since it is larger than the sum of its proper divisors (8935).

16728473 is an equidigital number, since it uses as much as digits as its factorization.

16728473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8934.

The product of its digits is 56448, while the sum is 38.

The square root of 16728473 is about 4090.0455987678. The cubic root of 16728473 is about 255.7518397988.

The spelling of 16728473 in words is "sixteen million, seven hundred twenty-eight thousand, four hundred seventy-three".