209013101 has 6 divisors (see below), whose sum is σ = 229741806. Its totient is φ = 190011800.

The previous prime is 209013061. The next prime is 209013131. The reversal of 209013101 is 101310902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 123432100 + 85581001 = 11110^2 + 9251^2 .

It is not a de Polignac number, because 209013101 - 2¹⁸ = 208750957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 209013101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209013131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 863570 + ... + 863811.

It is an arithmetic number, because the mean of its divisors is an integer number (38290301).

Almost surely, 2^209013101 is an apocalyptic number.

It is an amenable number.

209013101 is a deficient number, since it is larger than the sum of its proper divisors (20728705).

209013101 is a wasteful number, since it uses less digits than its factorization.

209013101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727403 (or 1727392 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 209013101 is about 14457.2853952601. The cubic root of 209013101 is about 593.4596137043.

The spelling of 209013101 in words is "two hundred nine million, thirteen thousand, one hundred one".