209960938 has 16 divisors (see below), whose sum is σ = 350884224. Its totient is φ = 93405760.

The previous prime is 209960911. The next prime is 209960939. The reversal of 209960938 is 839069902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (209960939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100495 + ... + 102562.

It is an arithmetic number, because the mean of its divisors is an integer number (21930264).

Almost surely, 2^209960938 is an apocalyptic number.

209960938 is a deficient number, since it is larger than the sum of its proper divisors (140923286).

209960938 is a wasteful number, since it uses less digits than its factorization.

209960938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203117.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 209960938 is about 14490.0289164653. The cubic root of 209960938 is about 594.3553387879.

The spelling of 209960938 in words is "two hundred nine million, nine hundred sixty thousand, nine hundred thirty-eight".