19797123 has 16 divisors (see below), whose sum is σ = 26998272. Its totient is φ = 12900000.

The previous prime is 19797101. The next prime is 19797133. The reversal of 19797123 is 32179791.

It is not a de Polignac number, because 19797123 - 2⁵ = 19797091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19797133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45718 + ... + 46148.

It is an arithmetic number, because the mean of its divisors is an integer number (1687392).

Almost surely, 2^19797123 is an apocalyptic number.

19797123 is a deficient number, since it is larger than the sum of its proper divisors (7201149).

19797123 is a wasteful number, since it uses less digits than its factorization.

19797123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746.

The product of its digits is 23814, while the sum is 39.

The square root of 19797123 is about 4449.3958016791. The cubic root of 19797123 is about 270.5208191319.

The spelling of 19797123 in words is "nineteen million, seven hundred ninety-seven thousand, one hundred twenty-three".