209979214 has 8 divisors (see below), whose sum is σ = 315366408. Its totient is φ = 104857080.

The previous prime is 209979197. The next prime is 209979229. The reversal of 209979214 is 412979902.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64272 + ... + 67459.

It is an arithmetic number, because the mean of its divisors is an integer number (39420801).

Almost surely, 2^209979214 is an apocalyptic number.

209979214 is a deficient number, since it is larger than the sum of its proper divisors (105387194).

209979214 is a wasteful number, since it uses less digits than its factorization.

209979214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132530.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 209979214 is about 14490.6595433058. The cubic root of 209979214 is about 594.3725834607.

The spelling of 209979214 in words is "two hundred nine million, nine hundred seventy-nine thousand, two hundred fourteen".