2042388209 has 4 divisors (see below), whose sum is σ = 2044631040. Its totient is φ = 2040145380.

The previous prime is 2042388203. The next prime is 2042388277. The reversal of 2042388209 is 9028832402.

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.

It is a cyclic number.

It is not a de Polignac number, because 2042388209 - 2²⁰ = 2041339633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2042388203) 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, 1120049 + ... + 1121870.

It is an arithmetic number, because the mean of its divisors is an integer number (511157760).

Almost surely, 2^2042388209 is an apocalyptic number.

It is an amenable number.

2042388209 is a deficient number, since it is larger than the sum of its proper divisors (2242831).

2042388209 is an equidigital number, since it uses as much as digits as its factorization.

2042388209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242830.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 2042388209 is about 45192.7893474169. The cubic root of 2042388209 is about 1268.7598634677.

The spelling of 2042388209 in words is "two billion, forty-two million, three hundred eighty-eight thousand, two hundred nine".