19716943 has 2 divisors, whose sum is σ = 19716944. Its totient is φ = 19716942.

The previous prime is 19716929. The next prime is 19716947. The reversal of 19716943 is 34961791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19716943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19716896 and 19716905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19716947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9858471 + 9858472.

It is an arithmetic number, because the mean of its divisors is an integer number (9858472).

Almost surely, 2^19716943 is an apocalyptic number.

19716943 is a deficient number, since it is larger than the sum of its proper divisors (1).

19716943 is an equidigital number, since it uses as much as digits as its factorization.

19716943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 19716943 is about 4440.3764480053. The cubic root of 19716943 is about 270.1551143452.

The spelling of 19716943 in words is "nineteen million, seven hundred sixteen thousand, nine hundred forty-three".