19798027 has 2 divisors, whose sum is σ = 19798028. Its totient is φ = 19798026.

The previous prime is 19798003. The next prime is 19798049. The reversal of 19798027 is 72089791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19798027 is a prime.

It is not a weakly prime, because it can be changed into another prime (19798067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9899013 + 9899014.

It is an arithmetic number, because the mean of its divisors is an integer number (9899014).

Almost surely, 2^19798027 is an apocalyptic number.

19798027 is a deficient number, since it is larger than the sum of its proper divisors (1).

19798027 is an equidigital number, since it uses as much as digits as its factorization.

19798027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 19798027 is about 4449.4973873461. The cubic root of 19798027 is about 270.5249366847.

The spelling of 19798027 in words is "nineteen million, seven hundred ninety-eight thousand, twenty-seven".