19489093 has 4 divisors (see below), whose sum is σ = 20988268. Its totient is φ = 17989920.

The previous prime is 19489069. The next prime is 19489097. The reversal of 19489093 is 39098491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39098491 = 103 ⋅379597.

It can be written as a sum of positive squares in 2 ways, for example, as 1790244 + 17698849 = 1338^2 + 4207^2 .

It is a de Polignac number, because none of the positive numbers 2^k-19489093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19489097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749568 + ... + 749593.

It is an arithmetic number, because the mean of its divisors is an integer number (5247067).

Almost surely, 2^19489093 is an apocalyptic number.

19489093 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19489093 is a deficient number, since it is larger than the sum of its proper divisors (1499175).

19489093 is a wasteful number, since it uses less digits than its factorization.

19489093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499174.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 19489093 is about 4414.6452858639. The cubic root of 19489093 is about 269.1104377408.

The spelling of 19489093 in words is "nineteen million, four hundred eighty-nine thousand, ninety-three".