19399073 has 2 divisors, whose sum is σ = 19399074. Its totient is φ = 19399072.

The previous prime is 19399069. The next prime is 19399099. The reversal of 19399073 is 37099391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18731584 + 667489 = 4328^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 19399073 - 2² = 19399069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19399073.

It is not a weakly prime, because it can be changed into another prime (19399013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9699536 + 9699537.

It is an arithmetic number, because the mean of its divisors is an integer number (9699537).

Almost surely, 2^19399073 is an apocalyptic number.

It is an amenable number.

19399073 is a deficient number, since it is larger than the sum of its proper divisors (1).

19399073 is an equidigital number, since it uses as much as digits as its factorization.

19399073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 19399073 is about 4404.4378755977. The cubic root of 19399073 is about 268.6954583386.

The spelling of 19399073 in words is "nineteen million, three hundred ninety-nine thousand, seventy-three".