209494102 has 8 divisors (see below), whose sum is σ = 314306856. Its totient is φ = 104725152.

The previous prime is 209494081. The next prime is 209494127. The reversal of 209494102 is 201494902.

It is a happy number.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6693 + ... + 21535.

It is an arithmetic number, because the mean of its divisors is an integer number (39288357).

Almost surely, 2^209494102 is an apocalyptic number.

209494102 is a deficient number, since it is larger than the sum of its proper divisors (104812754).

209494102 is a wasteful number, since it uses less digits than its factorization.

209494102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21902.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 209494102 is about 14473.9110816669. The cubic root of 209494102 is about 593.9145070003.

The spelling of 209494102 in words is "two hundred nine million, four hundred ninety-four thousand, one hundred two".