19434449 has 2 divisors, whose sum is σ = 19434450. Its totient is φ = 19434448.

The previous prime is 19434439. The next prime is 19434463. The reversal of 19434449 is 94443491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17977600 + 1456849 = 4240^2 + 1207^2 .

It is an emirp because it is prime and its reverse (94443491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19434449 - 2⁴ = 19434433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (19434439) 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, 9717224 + 9717225.

It is an arithmetic number, because the mean of its divisors is an integer number (9717225).

Almost surely, 2^19434449 is an apocalyptic number.

It is an amenable number.

19434449 is a deficient number, since it is larger than the sum of its proper divisors (1).

19434449 is an equidigital number, since it uses as much as digits as its factorization.

19434449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 19434449 is about 4408.4519958825. The cubic root of 19434449 is about 268.8586894787.

It can be divided in two parts, 194 and 34449, that added together give a palindrome (34643).

The spelling of 19434449 in words is "nineteen million, four hundred thirty-four thousand, four hundred forty-nine".