19123973 has 4 divisors (see below), whose sum is σ = 20862528. Its totient is φ = 17385420.

The previous prime is 19123969. The next prime is 19123991. The reversal of 19123973 is 37932191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37932191 = 11 ⋅3448381.

It is a cyclic number.

It is not a de Polignac number, because 19123973 - 2² = 19123969 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 (19123903) 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, 869261 + ... + 869282.

It is an arithmetic number, because the mean of its divisors is an integer number (5215632).

Almost surely, 2^19123973 is an apocalyptic number.

It is an amenable number.

19123973 is a deficient number, since it is larger than the sum of its proper divisors (1738555).

19123973 is a wasteful number, since it uses less digits than its factorization.

19123973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738554.

The product of its digits is 10206, while the sum is 35.

The square root of 19123973 is about 4373.0965001930. The cubic root of 19123973 is about 267.4192751438.

It can be divided in two parts, 1912 and 3973, that added together give a palindrome (5885).

The spelling of 19123973 in words is "nineteen million, one hundred twenty-three thousand, nine hundred seventy-three".