209516930 has 16 divisors (see below), whose sum is σ = 431006400. Its totient is φ = 71834352.

The previous prime is 209516921. The next prime is 209516939. The reversal of 209516930 is 39615902.

It is an interprime number because it is at equal distance from previous prime (209516921) and next prime (209516939).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (209516939) 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, 1496480 + ... + 1496619.

It is an arithmetic number, because the mean of its divisors is an integer number (26937900).

Almost surely, 2^209516930 is an apocalyptic number.

209516930 is an abundant number, since it is smaller than the sum of its proper divisors (221489470).

209516930 is a wasteful number, since it uses less digits than its factorization.

209516930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993113.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 209516930 is about 14474.6996514608. The cubic root of 209516930 is about 593.9360786306.

The spelling of 209516930 in words is "two hundred nine million, five hundred sixteen thousand, nine hundred thirty".