209091141 has 24 divisors (see below), whose sum is σ = 345631104. Its totient is φ = 119319840.

The previous prime is 209091139. The next prime is 209091151. The reversal of 209091141 is 141190902.

It is not a de Polignac number, because 209091141 - 2¹ = 209091139 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 (209091101) 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, 57520 + ... + 61046.

It is an arithmetic number, because the mean of its divisors is an integer number (14401296).

Almost surely, 2^209091141 is an apocalyptic number.

209091141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

209091141 is a deficient number, since it is larger than the sum of its proper divisors (136539963).

209091141 is a wasteful number, since it uses less digits than its factorization.

209091141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4481 (or 4478 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 209091141 is about 14459.9841286220. The cubic root of 209091141 is about 593.5334652557.

The spelling of 209091141 in words is "two hundred nine million, ninety-one thousand, one hundred forty-one".