2019923 has 4 divisors (see below), whose sum is σ = 2138760. Its totient is φ = 1901088.

The previous prime is 2019911. The next prime is 2019931. The reversal of 2019923 is 3299102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2019923 - 2⁴ = 2019907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2019892 and 2019901.

It is not an unprimeable number, because it can be changed into a prime (2019973) 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, 59393 + ... + 59426.

It is an arithmetic number, because the mean of its divisors is an integer number (534690).

2^2019923 is an apocalyptic number.

2019923 is a deficient number, since it is larger than the sum of its proper divisors (118837).

2019923 is a wasteful number, since it uses less digits than its factorization.

2019923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118836.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2019923 is about 1421.2399515916. The cubic root of 2019923 is about 126.4090802575.

The spelling of 2019923 in words is "two million, nineteen thousand, nine hundred twenty-three".