19799123 has 2 divisors, whose sum is σ = 19799124. Its totient is φ = 19799122.

The previous prime is 19799099. The next prime is 19799137. The reversal of 19799123 is 32199791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19799123 - 2¹⁴ = 19782739 is a prime.

It is not a weakly prime, because it can be changed into another prime (19799183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9899561 + 9899562.

It is an arithmetic number, because the mean of its divisors is an integer number (9899562).

Almost surely, 2^19799123 is an apocalyptic number.

19799123 is a deficient number, since it is larger than the sum of its proper divisors (1).

19799123 is an equidigital number, since it uses as much as digits as its factorization.

19799123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 19799123 is about 4449.6205456196. The cubic root of 19799123 is about 270.5299285939.

The spelling of 19799123 in words is "nineteen million, seven hundred ninety-nine thousand, one hundred twenty-three".