19102147 has 2 divisors, whose sum is σ = 19102148. Its totient is φ = 19102146.

The previous prime is 19102123. The next prime is 19102151. The reversal of 19102147 is 74120191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19102147 - 2¹¹ = 19100099 is a prime.

It is not a weakly prime, because it can be changed into another prime (19102157) 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, 9551073 + 9551074.

It is an arithmetic number, because the mean of its divisors is an integer number (9551074).

Almost surely, 2^19102147 is an apocalyptic number.

19102147 is a deficient number, since it is larger than the sum of its proper divisors (1).

19102147 is an equidigital number, since it uses as much as digits as its factorization.

19102147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 19102147 is about 4370.6003020180. The cubic root of 19102147 is about 267.3175020977.

The spelling of 19102147 in words is "nineteen million, one hundred two thousand, one hundred forty-seven".