16719947 has 2 divisors, whose sum is σ = 16719948. Its totient is φ = 16719946.

The previous prime is 16719907. The next prime is 16719973. The reversal of 16719947 is 74991761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16719947 - 2⁶ = 16719883 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16719898 and 16719907.

It is not a weakly prime, because it can be changed into another prime (16719907) 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 as a sum of consecutive naturals, namely, 8359973 + 8359974.

It is an arithmetic number, because the mean of its divisors is an integer number (8359974).

Almost surely, 2^16719947 is an apocalyptic number.

16719947 is a deficient number, since it is larger than the sum of its proper divisors (1).

16719947 is an equidigital number, since it uses as much as digits as its factorization.

16719947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 44.

The square root of 16719947 is about 4089.0031792602. The cubic root of 16719947 is about 255.7083827392.

The spelling of 16719947 in words is "sixteen million, seven hundred nineteen thousand, nine hundred forty-seven".