209616134 has 16 divisors (see below), whose sum is σ = 386983968. Its totient is φ = 82924992.

The previous prime is 209616131. The next prime is 209616157. The reversal of 209616134 is 431616902.

It is a self number, because there is not a number n which added to its sum of digits gives 209616134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209616131) 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, 575687 + ... + 576050.

It is an arithmetic number, because the mean of its divisors is an integer number (24186498).

Almost surely, 2^209616134 is an apocalyptic number.

209616134 is a deficient number, since it is larger than the sum of its proper divisors (177367834).

209616134 is a wasteful number, since it uses less digits than its factorization.

209616134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151759.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 209616134 is about 14478.1260527735. The cubic root of 209616134 is about 594.0298046089.

The spelling of 209616134 in words is "two hundred nine million, six hundred sixteen thousand, one hundred thirty-four".