19219943 has 2 divisors, whose sum is σ = 19219944. Its totient is φ = 19219942.

The previous prime is 19219933. The next prime is 19219987. The reversal of 19219943 is 34991291.

It is a weak prime.

It is an emirp because it is prime and its reverse (34991291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19219943 - 2¹⁶ = 19154407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19219897 and 19219906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19219933) 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, 9609971 + 9609972.

It is an arithmetic number, because the mean of its divisors is an integer number (9609972).

Almost surely, 2^19219943 is an apocalyptic number.

19219943 is a deficient number, since it is larger than the sum of its proper divisors (1).

19219943 is an equidigital number, since it uses as much as digits as its factorization.

19219943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 19219943 is about 4384.0555425314. The cubic root of 19219943 is about 267.8658597663.

The spelling of 19219943 in words is "nineteen million, two hundred nineteen thousand, nine hundred forty-three".