209941063 has 4 divisors (see below), whose sum is σ = 217180440. Its totient is φ = 202701688.

The previous prime is 209941049. The next prime is 209941073. The reversal of 209941063 is 360149902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 209941063 - 2⁵ = 209941031 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 (209941073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3619645 + ... + 3619702.

It is an arithmetic number, because the mean of its divisors is an integer number (54295110).

Almost surely, 2^209941063 is an apocalyptic number.

209941063 is a deficient number, since it is larger than the sum of its proper divisors (7239377).

209941063 is an equidigital number, since it uses as much as digits as its factorization.

209941063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7239376.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 209941063 is about 14489.3430837978. The cubic root of 209941063 is about 594.3365842119.

The spelling of 209941063 in words is "two hundred nine million, nine hundred forty-one thousand, sixty-three".