19399223 has 2 divisors, whose sum is σ = 19399224. Its totient is φ = 19399222.

The previous prime is 19399213. The next prime is 19399243. The reversal of 19399223 is 32299391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19399223 - 2¹⁰ = 19398199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19399213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9699611 + 9699612.

It is an arithmetic number, because the mean of its divisors is an integer number (9699612).

Almost surely, 2^19399223 is an apocalyptic number.

19399223 is a deficient number, since it is larger than the sum of its proper divisors (1).

19399223 is an equidigital number, since it uses as much as digits as its factorization.

19399223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 38.

The square root of 19399223 is about 4404.4549038445. The cubic root of 19399223 is about 268.6961508840.

The spelling of 19399223 in words is "nineteen million, three hundred ninety-nine thousand, two hundred twenty-three".