19923193 has 2 divisors, whose sum is σ = 19923194. Its totient is φ = 19923192.

The previous prime is 19923161. The next prime is 19923223. The reversal of 19923193 is 39132991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16548624 + 3374569 = 4068^2 + 1837^2 .

It is an emirp because it is prime and its reverse (39132991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19923193 - 2⁵ = 19923161 is a prime.

It is not a weakly prime, because it can be changed into another prime (19929193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9961596 + 9961597.

It is an arithmetic number, because the mean of its divisors is an integer number (9961597).

Almost surely, 2^19923193 is an apocalyptic number.

It is an amenable number.

19923193 is a deficient number, since it is larger than the sum of its proper divisors (1).

19923193 is an equidigital number, since it uses as much as digits as its factorization.

19923193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 37.

The square root of 19923193 is about 4463.5404109294. The cubic root of 19923193 is about 271.0938387737.

The spelling of 19923193 in words is "nineteen million, nine hundred twenty-three thousand, one hundred ninety-three".