209043930 has 32 divisors (see below), whose sum is σ = 504912384. Its totient is φ = 55388736.

The previous prime is 209043929. The next prime is 209043931. The reversal of 209043930 is 39340902.

It is an interprime number because it is at equal distance from previous prime (209043929) and next prime (209043931).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (209043931) 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, 17482 + ... + 26901.

It is an arithmetic number, because the mean of its divisors is an integer number (15778512).

Almost surely, 2^209043930 is an apocalyptic number.

209043930 is an abundant number, since it is smaller than the sum of its proper divisors (295868454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209043930 is a wasteful number, since it uses less digits than its factorization.

209043930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44550.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 209043930 is about 14458.3515657906. The cubic root of 209043930 is about 593.4887902916.

The spelling of 209043930 in words is "two hundred nine million, forty-three thousand, nine hundred thirty".