19198147 has 2 divisors, whose sum is σ = 19198148. Its totient is φ = 19198146.

The previous prime is 19198139. The next prime is 19198159. The reversal of 19198147 is 74189191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19198147 - 2³ = 19198139 is a prime.

It is not a weakly prime, because it can be changed into another prime (19198177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9599073 + 9599074.

It is an arithmetic number, because the mean of its divisors is an integer number (9599074).

Almost surely, 2^19198147 is an apocalyptic number.

19198147 is a deficient number, since it is larger than the sum of its proper divisors (1).

19198147 is an equidigital number, since it uses as much as digits as its factorization.

19198147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 40.

The square root of 19198147 is about 4381.5690112105. The cubic root of 19198147 is about 267.7645654553.

The spelling of 19198147 in words is "nineteen million, one hundred ninety-eight thousand, one hundred forty-seven".