2209847961 has 8 divisors (see below), whose sum is σ = 2983761280. Its totient is φ = 1454583312.

The previous prime is 2209847923. The next prime is 2209847963. The reversal of 2209847961 is 1697489022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2209847961 - 2¹⁰ = 2209846937 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 2209847961.

It is not an unprimeable number, because it can be changed into a prime (2209847963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4661890 + ... + 4662363.

It is an arithmetic number, because the mean of its divisors is an integer number (372970160).

Almost surely, 2^2209847961 is an apocalyptic number.

It is an amenable number.

2209847961 is a deficient number, since it is larger than the sum of its proper divisors (773913319).

2209847961 is an equidigital number, since it uses as much as digits as its factorization.

2209847961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324335.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 2209847961 is about 47009.0199961667. The cubic root of 2209847961 is about 1302.5291907846.

The spelling of 2209847961 in words is "two billion, two hundred nine million, eight hundred forty-seven thousand, nine hundred sixty-one".