209013061 has 2 divisors, whose sum is σ = 209013062. Its totient is φ = 209013060.

The previous prime is 209013047. The next prime is 209013131. The reversal of 209013061 is 160310902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156000100 + 53012961 = 12490^2 + 7281^2 .

It is a cyclic number.

It is not a de Polignac number, because 209013061 - 2²⁵ = 175458629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209014061) 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 as a sum of consecutive naturals, namely, 104506530 + 104506531.

It is an arithmetic number, because the mean of its divisors is an integer number (104506531).

Almost surely, 2^209013061 is an apocalyptic number.

It is an amenable number.

209013061 is a deficient number, since it is larger than the sum of its proper divisors (1).

209013061 is an equidigital number, since it uses as much as digits as its factorization.

209013061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 209013061 is about 14457.2840118744. The cubic root of 209013061 is about 593.4595758464.

Adding to 209013061 its reverse (160310902), we get a palindrome (369323963).

It can be divided in two parts, 2090 and 13061, that added together give a palindrome (15151).

The spelling of 209013061 in words is "two hundred nine million, thirteen thousand, sixty-one".