19397047 has 2 divisors, whose sum is σ = 19397048. Its totient is φ = 19397046.

The previous prime is 19397011. The next prime is 19397057. The reversal of 19397047 is 74079391.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19397047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19397057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9698523 + 9698524.

It is an arithmetic number, because the mean of its divisors is an integer number (9698524).

Almost surely, 2^19397047 is an apocalyptic number.

19397047 is a deficient number, since it is larger than the sum of its proper divisors (1).

19397047 is an equidigital number, since it uses as much as digits as its factorization.

19397047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 19397047 is about 4404.2078742948. The cubic root of 19397047 is about 268.6861040093.

The spelling of 19397047 in words is "nineteen million, three hundred ninety-seven thousand, forty-seven".