209897107994 has 8 divisors (see below), whose sum is σ = 359823613728. Its totient is φ = 89955903420.

The previous prime is 209897107993. The next prime is 209897108039. The reversal of 209897107994 is 499701798902.

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

It is a self number, because there is not a number n which added to its sum of digits gives 209897107994.

It is not an unprimeable number, because it can be changed into a prime (209897107993) 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, 7496325272 + ... + 7496325299.

It is an arithmetic number, because the mean of its divisors is an integer number (44977951716).

Almost surely, 2^209897107994 is an apocalyptic number.

209897107994 is a deficient number, since it is larger than the sum of its proper divisors (149926505734).

209897107994 is a wasteful number, since it uses less digits than its factorization.

209897107994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14992650580.

The product of its (nonzero) digits is 20575296, while the sum is 65.

The spelling of 209897107994 in words is "two hundred nine billion, eight hundred ninety-seven million, one hundred seven thousand, nine hundred ninety-four".