209004890 has 8 divisors (see below), whose sum is σ = 376208820. Its totient is φ = 83601952.

The previous prime is 209004857. The next prime is 209004923. The reversal of 209004890 is 98400902.

209004890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (209004857) and next prime (209004923).

It can be written as a sum of positive squares in 2 ways, for example, as 179051161 + 29953729 = 13381^2 + 5473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10450235 + ... + 10450254.

Almost surely, 2^209004890 is an apocalyptic number.

209004890 is a deficient number, since it is larger than the sum of its proper divisors (167203930).

209004890 is a wasteful number, since it uses less digits than its factorization.

209004890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20900496.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 209004890 is about 14457.0014179981. The cubic root of 209004890 is about 593.4518423243.

The spelling of 209004890 in words is "two hundred nine million, four thousand, eight hundred ninety".