209313930 has 64 divisors (see below), whose sum is σ = 575758080. Its totient is φ = 47706624.

The previous prime is 209313917. The next prime is 209313941. The reversal of 209313930 is 39313902.

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

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 84672 + ... + 87108.

It is an arithmetic number, because the mean of its divisors is an integer number (8996220).

Almost surely, 2^209313930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209313930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287879040).

209313930 is an abundant number, since it is smaller than the sum of its proper divisors (366444150).

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

209313930 is a wasteful number, since it uses less digits than its factorization.

209313930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 209313930 is about 14467.6857167966. The cubic root of 209313930 is about 593.7441959913.

The spelling of 209313930 in words is "two hundred nine million, three hundred thirteen thousand, nine hundred thirty".