209444002 has 4 divisors (see below), whose sum is σ = 314166006. Its totient is φ = 104722000.

The previous prime is 209443991. The next prime is 209444021. The reversal of 209444002 is 200444902.

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

It can be written as a sum of positive squares in only one way, i.e., 193515921 + 15928081 = 13911^2 + 3991^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52360999 + ... + 52361002.

Almost surely, 2^209444002 is an apocalyptic number.

209444002 is a deficient number, since it is larger than the sum of its proper divisors (104722004).

209444002 is a wasteful number, since it uses less digits than its factorization.

209444002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104722003.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 209444002 is about 14472.1802780369. The cubic root of 209444002 is about 593.8671588271.

Adding to 209444002 its reverse (200444902), we get a palindrome (409888904).

The spelling of 209444002 in words is "two hundred nine million, four hundred forty-four thousand, two".