209944101 has 16 divisors (see below), whose sum is σ = 299968704. Its totient is φ = 130139904.

The previous prime is 209944087. The next prime is 209944123. The reversal of 209944101 is 101449902.

209944101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209944101 - 2⁶ = 209944037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209944151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20566 + ... + 29031.

It is an arithmetic number, because the mean of its divisors is an integer number (18748044).

Almost surely, 2^209944101 is an apocalyptic number.

It is an amenable number.

209944101 is a deficient number, since it is larger than the sum of its proper divisors (90024603).

209944101 is a wasteful number, since it uses less digits than its factorization.

209944101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49700.

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

The square root of 209944101 is about 14489.4479190893. The cubic root of 209944101 is about 594.3394510258.

The spelling of 209944101 in words is "two hundred nine million, nine hundred forty-four thousand, one hundred one".