209993195 has 4 divisors (see below), whose sum is σ = 251991840. Its totient is φ = 167994552.

The previous prime is 209993191. The next prime is 209993233. The reversal of 209993195 is 591399902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 209993195 - 2² = 209993191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209993191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20999315 + ... + 20999324.

It is an arithmetic number, because the mean of its divisors is an integer number (62997960).

Almost surely, 2^209993195 is an apocalyptic number.

209993195 is a deficient number, since it is larger than the sum of its proper divisors (41998645).

209993195 is an equidigital number, since it uses as much as digits as its factorization.

209993195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41998644.

The product of its (nonzero) digits is 196830, while the sum is 47.

The square root of 209993195 is about 14491.1419494807. The cubic root of 209993195 is about 594.3857748278.

The spelling of 209993195 in words is "two hundred nine million, nine hundred ninety-three thousand, one hundred ninety-five".