209684134 has 8 divisors (see below), whose sum is σ = 343119528. Its totient is φ = 95310960.

The previous prime is 209684099. The next prime is 209684159. The reversal of 209684134 is 431486902.

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

It is a junction number, because it is equal to n+sod(n) for n = 209684093 and 209684102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4765527 + ... + 4765570.

It is an arithmetic number, because the mean of its divisors is an integer number (42889941).

Almost surely, 2^209684134 is an apocalyptic number.

209684134 is a deficient number, since it is larger than the sum of its proper divisors (133435394).

209684134 is a wasteful number, since it uses less digits than its factorization.

209684134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9531110.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 209684134 is about 14480.4742325657. The cubic root of 209684134 is about 594.0940325841.

The spelling of 209684134 in words is "two hundred nine million, six hundred eighty-four thousand, one hundred thirty-four".