209442589 has 8 divisors (see below), whose sum is σ = 211815648. Its totient is φ = 207075600.

The previous prime is 209442581. The next prime is 209442599. The reversal of 209442589 is 985244902.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 209442589 - 2³ = 209442581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209442581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119014 + ... + 120760.

It is an arithmetic number, because the mean of its divisors is an integer number (26476956).

Almost surely, 2^209442589 is an apocalyptic number.

It is an amenable number.

209442589 is a deficient number, since it is larger than the sum of its proper divisors (2373059).

209442589 is a wasteful number, since it uses less digits than its factorization.

209442589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3035.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 209442589 is about 14472.1314601547. The cubic root of 209442589 is about 593.8658233291.

The spelling of 209442589 in words is "two hundred nine million, four hundred forty-two thousand, five hundred eighty-nine".