209930329 has 4 divisors (see below), whose sum is σ = 239920384. Its totient is φ = 179940276.

The previous prime is 209930321. The next prime is 209930351. The reversal of 209930329 is 923039902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 209930329 - 2³ = 209930321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209930321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14995017 + ... + 14995030.

It is an arithmetic number, because the mean of its divisors is an integer number (59980096).

Almost surely, 2^209930329 is an apocalyptic number.

It is an amenable number.

209930329 is a deficient number, since it is larger than the sum of its proper divisors (29990055).

209930329 is an equidigital number, since it uses as much as digits as its factorization.

209930329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29990054.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 209930329 is about 14488.9726688955. The cubic root of 209930329 is about 594.3264548332.

The spelling of 209930329 in words is "two hundred nine million, nine hundred thirty thousand, three hundred twenty-nine".