209068156 has 48 divisors (see below), whose sum is σ = 407296512. Its totient is φ = 93886320.

The previous prime is 209068151. The next prime is 209068169. The reversal of 209068156 is 651860902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209068151) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 569485 + ... + 569851.

It is an arithmetic number, because the mean of its divisors is an integer number (8485344).

Almost surely, 2^209068156 is an apocalyptic number.

It is an amenable number.

209068156 is a deficient number, since it is larger than the sum of its proper divisors (198228356).

209068156 is a wasteful number, since it uses less digits than its factorization.

209068156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 209068156 is about 14459.1893272064. The cubic root of 209068156 is about 593.5117157824.

The spelling of 209068156 in words is "two hundred nine million, sixty-eight thousand, one hundred fifty-six".