19214989 has 2 divisors, whose sum is σ = 19214990. Its totient is φ = 19214988.

The previous prime is 19214983. The next prime is 19214999. The reversal of 19214989 is 98941291.

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., 10465225 + 8749764 = 3235^2 + 2958^2 .

It is an emirp because it is prime and its reverse (98941291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19214989 - 2¹⁷ = 19083917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19214983) 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, 9607494 + 9607495.

It is an arithmetic number, because the mean of its divisors is an integer number (9607495).

Almost surely, 2^19214989 is an apocalyptic number.

It is an amenable number.

19214989 is a deficient number, since it is larger than the sum of its proper divisors (1).

19214989 is an equidigital number, since it uses as much as digits as its factorization.

19214989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The square root of 19214989 is about 4383.4905041531. The cubic root of 19214989 is about 267.8428433695.

The spelling of 19214989 in words is "nineteen million, two hundred fourteen thousand, nine hundred eighty-nine".