209101389 has 16 divisors (see below), whose sum is σ = 326042112. Its totient is φ = 116707248.

The previous prime is 209101357. The next prime is 209101391. The reversal of 209101389 is 983101902.

209101389 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 209101389 - 2⁵ = 209101357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209001389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114879 + ... + 116684.

It is an arithmetic number, because the mean of its divisors is an integer number (20377632).

Almost surely, 2^209101389 is an apocalyptic number.

It is an amenable number.

209101389 is a deficient number, since it is larger than the sum of its proper divisors (116940723).

209101389 is a wasteful number, since it uses less digits than its factorization.

209101389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231616.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 209101389 is about 14460.3384815156. The cubic root of 209101389 is about 593.5431618750.

The spelling of 209101389 in words is "two hundred nine million, one hundred one thousand, three hundred eighty-nine".