19198943 has 2 divisors, whose sum is σ = 19198944. Its totient is φ = 19198942.

The previous prime is 19198939. The next prime is 19198969. The reversal of 19198943 is 34989191.

It is a weak prime.

It is an emirp because it is prime and its reverse (34989191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19198943 - 2² = 19198939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19198894 and 19198903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19198913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9599471 + 9599472.

It is an arithmetic number, because the mean of its divisors is an integer number (9599472).

Almost surely, 2^19198943 is an apocalyptic number.

19198943 is a deficient number, since it is larger than the sum of its proper divisors (1).

19198943 is an equidigital number, since it uses as much as digits as its factorization.

19198943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 44.

The square root of 19198943 is about 4381.6598453098. The cubic root of 19198943 is about 267.7682661189.

The spelling of 19198943 in words is "nineteen million, one hundred ninety-eight thousand, nine hundred forty-three".