19983247 has 2 divisors, whose sum is σ = 19983248. Its totient is φ = 19983246.

The previous prime is 19983221. The next prime is 19983281. The reversal of 19983247 is 74238991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19983247 - 2¹⁵ = 19950479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19983547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9991623 + 9991624.

It is an arithmetic number, because the mean of its divisors is an integer number (9991624).

Almost surely, 2^19983247 is an apocalyptic number.

19983247 is a deficient number, since it is larger than the sum of its proper divisors (1).

19983247 is an equidigital number, since it uses as much as digits as its factorization.

19983247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 19983247 is about 4470.2625202554. The cubic root of 19983247 is about 271.3659494236.

The spelling of 19983247 in words is "nineteen million, nine hundred eighty-three thousand, two hundred forty-seven".