19798349 has 2 divisors, whose sum is σ = 19798350. Its totient is φ = 19798348.

The previous prime is 19798321. The next prime is 19798357. The reversal of 19798349 is 94389791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14577124 + 5221225 = 3818^2 + 2285^2 .

It is an emirp because it is prime and its reverse (94389791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19798349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19798297 and 19798306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19798369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9899174 + 9899175.

It is an arithmetic number, because the mean of its divisors is an integer number (9899175).

Almost surely, 2^19798349 is an apocalyptic number.

It is an amenable number.

19798349 is a deficient number, since it is larger than the sum of its proper divisors (1).

19798349 is an equidigital number, since it uses as much as digits as its factorization.

19798349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 19798349 is about 4449.5335710611. The cubic root of 19798349 is about 270.5264033049.

The spelling of 19798349 in words is "nineteen million, seven hundred ninety-eight thousand, three hundred forty-nine".