19213147 has 2 divisors, whose sum is σ = 19213148. Its totient is φ = 19213146.

The previous prime is 19213127. The next prime is 19213151. The reversal of 19213147 is 74131291.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19213147 is a prime.

It is a zygodrome in base 8.

It is not a weakly prime, because it can be changed into another prime (19213127) 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, 9606573 + 9606574.

It is an arithmetic number, because the mean of its divisors is an integer number (9606574).

Almost surely, 2^19213147 is an apocalyptic number.

19213147 is a deficient number, since it is larger than the sum of its proper divisors (1).

19213147 is an equidigital number, since it uses as much as digits as its factorization.

19213147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 19213147 is about 4383.2803925827. The cubic root of 19213147 is about 267.8342843867.

The spelling of 19213147 in words is "nineteen million, two hundred thirteen thousand, one hundred forty-seven".