2961005209 has 8 divisors (see below), whose sum is σ = 3186579528. Its totient is φ = 2741141760.

The previous prime is 2961005171. The next prime is 2961005227. The reversal of 2961005209 is 9025001692.

It can be written as a sum of positive squares in 4 ways, for example, as 25532809 + 2935472400 = 5053^2 + 54180^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2961005209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2961005279) 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, 1426642 + ... + 1428715.

It is an arithmetic number, because the mean of its divisors is an integer number (398322441).

Almost surely, 2^2961005209 is an apocalyptic number.

It is an amenable number.

2961005209 is a deficient number, since it is larger than the sum of its proper divisors (225574319).

2961005209 is a wasteful number, since it uses less digits than its factorization.

2961005209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855435.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 2961005209 is about 54415.1193052078. The cubic root of 2961005209 is about 1435.9733846773.

The spelling of 2961005209 in words is "two billion, nine hundred sixty-one million, five thousand, two hundred nine".