19342889 has 4 divisors (see below), whose sum is σ = 20480724. Its totient is φ = 18205056.

The previous prime is 19342879. The next prime is 19342891. The reversal of 19342889 is 98824391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98824391 = 41 ⋅2410351.

It can be written as a sum of positive squares in 2 ways, for example, as 6325225 + 13017664 = 2515^2 + 3608^2 .

It is a cyclic number.

It is not a de Polignac number, because 19342889 - 2²⁰ = 18294313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19342859) 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 in 3 ways as a sum of consecutive naturals, for example, 568892 + ... + 568925.

It is an arithmetic number, because the mean of its divisors is an integer number (5120181).

Almost surely, 2^19342889 is an apocalyptic number.

It is an amenable number.

19342889 is a deficient number, since it is larger than the sum of its proper divisors (1137835).

19342889 is a wasteful number, since it uses less digits than its factorization.

19342889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137834.

The product of its digits is 124416, while the sum is 44.

The square root of 19342889 is about 4398.0551383538. The cubic root of 19342889 is about 268.4358070436.

The spelling of 19342889 in words is "nineteen million, three hundred forty-two thousand, eight hundred eighty-nine".