209304642 has 8 divisors (see below), whose sum is σ = 418609296. Its totient is φ = 69768212.

The previous prime is 209304637. The next prime is 209304647. The reversal of 209304642 is 246403902.

209304642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (209304637) and next prime (209304647).

It is a sphenic number, since it is the product of 3 distinct primes.

209304642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (209304647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17442048 + ... + 17442059.

It is an arithmetic number, because the mean of its divisors is an integer number (52326162).

Almost surely, 2^209304642 is an apocalyptic number.

209304642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

209304642 is a wasteful number, since it uses less digits than its factorization.

209304642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34884112.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 209304642 is about 14467.3647220218. The cubic root of 209304642 is about 593.7354136841.

The spelling of 209304642 in words is "two hundred nine million, three hundred four thousand, six hundred forty-two".