2209387361 has 4 divisors (see below), whose sum is σ = 2209512900. Its totient is φ = 2209261824.

The previous prime is 2209387339. The next prime is 2209387387. The reversal of 2209387361 is 1637839022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1637839022 = 2 ⋅818919511.

It can be written as a sum of positive squares in 2 ways, for example, as 1973580625 + 235806736 = 44425^2 + 15356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2209387361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2209387321) 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 3 ways as a sum of consecutive naturals, for example, 31016 + ... + 73353.

It is an arithmetic number, because the mean of its divisors is an integer number (552378225).

Almost surely, 2^2209387361 is an apocalyptic number.

It is an amenable number.

2209387361 is a deficient number, since it is larger than the sum of its proper divisors (125539).

2209387361 is a wasteful number, since it uses less digits than its factorization.

2209387361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125538.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 2209387361 is about 47004.1206810637. The cubic root of 2209387361 is about 1302.4386888371.

The spelling of 2209387361 in words is "two billion, two hundred nine million, three hundred eighty-seven thousand, three hundred sixty-one".