209494101 has 8 divisors (see below), whose sum is σ = 282205504. Its totient is φ = 138222720.

The previous prime is 209494081. The next prime is 209494127. The reversal of 209494101 is 101494902.

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

It is not a de Polignac number, because 209494101 - 2¹⁰ = 209493077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209494141) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 359665 + ... + 360246.

It is an arithmetic number, because the mean of its divisors is an integer number (35275688).

Almost surely, 2^209494101 is an apocalyptic number.

It is an amenable number.

209494101 is a deficient number, since it is larger than the sum of its proper divisors (72711403).

209494101 is an equidigital number, since it uses as much as digits as its factorization.

209494101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720011.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 209494101 is about 14473.9110471220. The cubic root of 209494101 is about 593.9145060553.

The spelling of 209494101 in words is "two hundred nine million, four hundred ninety-four thousand, one hundred one".