19124389 has 2 divisors, whose sum is σ = 19124390. Its totient is φ = 19124388.

The previous prime is 19124383. The next prime is 19124401. The reversal of 19124389 is 98342191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12723489 + 6400900 = 3567^2 + 2530^2 .

It is an emirp because it is prime and its reverse (98342191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19124389 - 2¹⁵ = 19091621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19124383) 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, 9562194 + 9562195.

It is an arithmetic number, because the mean of its divisors is an integer number (9562195).

Almost surely, 2^19124389 is an apocalyptic number.

It is an amenable number.

19124389 is a deficient number, since it is larger than the sum of its proper divisors (1).

19124389 is an equidigital number, since it uses as much as digits as its factorization.

19124389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 19124389 is about 4373.1440634857. The cubic root of 19124389 is about 267.4212141693.

The spelling of 19124389 in words is "nineteen million, one hundred twenty-four thousand, three hundred eighty-nine".