19223249 has 2 divisors, whose sum is σ = 19223250. Its totient is φ = 19223248.

The previous prime is 19223233. The next prime is 19223251. The reversal of 19223249 is 94232291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15745024 + 3478225 = 3968^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 19223249 - 2⁴ = 19223233 is a prime.

Together with 19223251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19223749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9611624 + 9611625.

It is an arithmetic number, because the mean of its divisors is an integer number (9611625).

Almost surely, 2^19223249 is an apocalyptic number.

It is an amenable number.

19223249 is a deficient number, since it is larger than the sum of its proper divisors (1).

19223249 is an equidigital number, since it uses as much as digits as its factorization.

19223249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 19223249 is about 4384.4325744616. The cubic root of 19223249 is about 267.8812173172.

The spelling of 19223249 in words is "nineteen million, two hundred twenty-three thousand, two hundred forty-nine".