209489283 has 24 divisors (see below), whose sum is σ = 321617088. Its totient is φ = 130943232.

The previous prime is 209489281. The next prime is 209489407. The reversal of 209489283 is 382984902.

209489283 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209489283 - 2¹ = 209489281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209489281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39910 + ... + 44852.

It is an arithmetic number, because the mean of its divisors is an integer number (13400712).

Almost surely, 2^209489283 is an apocalyptic number.

209489283 is a deficient number, since it is larger than the sum of its proper divisors (112127805).

209489283 is a wasteful number, since it uses less digits than its factorization.

209489283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243 (or 5240 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 209489283 is about 14473.7446087735. The cubic root of 209489283 is about 593.9099530202.

The spelling of 209489283 in words is "two hundred nine million, four hundred eighty-nine thousand, two hundred eighty-three".