16728947 has 2 divisors, whose sum is σ = 16728948. Its totient is φ = 16728946.

The previous prime is 16728941. The next prime is 16728953. The reversal of 16728947 is 74982761.

It is a balanced prime because it is at equal distance from previous prime (16728941) and next prime (16728953).

It is a cyclic number.

It is not a de Polignac number, because 16728947 - 2⁶ = 16728883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16728898 and 16728907.

It is not a weakly prime, because it can be changed into another prime (16728941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8364473 + 8364474.

It is an arithmetic number, because the mean of its divisors is an integer number (8364474).

Almost surely, 2^16728947 is an apocalyptic number.

16728947 is a deficient number, since it is larger than the sum of its proper divisors (1).

16728947 is an equidigital number, since it uses as much as digits as its factorization.

16728947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 16728947 is about 4090.1035439216. The cubic root of 16728947 is about 255.7542553456.

The spelling of 16728947 in words is "sixteen million, seven hundred twenty-eight thousand, nine hundred forty-seven".