209193101 has 6 divisors (see below), whose sum is σ = 226522890. Its totient is φ = 193101168.

The previous prime is 209193077. The next prime is 209193113. The reversal of 209193101 is 101391902.

It can be written as a sum of positive squares in 3 ways, for example, as 7695076 + 201498025 = 2774^2 + 14195^2 .

It is not a de Polignac number, because 209193101 - 2²⁶ = 142084237 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 (209193181) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 618746 + ... + 619083.

It is an arithmetic number, because the mean of its divisors is an integer number (37753815).

Almost surely, 2^209193101 is an apocalyptic number.

It is an amenable number.

209193101 is a deficient number, since it is larger than the sum of its proper divisors (17329789).

209193101 is a wasteful number, since it uses less digits than its factorization.

209193101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237855 (or 1237842 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 209193101 is about 14463.5092906251. The cubic root of 209193101 is about 593.6299253255.

The spelling of 209193101 in words is "two hundred nine million, one hundred ninety-three thousand, one hundred one".