2909199961 has 2 divisors, whose sum is σ = 2909199962. Its totient is φ = 2909199960.

The previous prime is 2909199949. The next prime is 2909199971. The reversal of 2909199961 is 1699919092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2532102400 + 377097561 = 50320^2 + 19419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2909199961 is a prime.

It is not a weakly prime, because it can be changed into another prime (2909199911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1454599980 + 1454599981.

It is an arithmetic number, because the mean of its divisors is an integer number (1454599981).

Almost surely, 2^2909199961 is an apocalyptic number.

It is an amenable number.

2909199961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2909199961 is an equidigital number, since it uses as much as digits as its factorization.

2909199961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708588, while the sum is 55.

The square root of 2909199961 is about 53936.9999258394. Note that the first 4 decimals coincide. The cubic root of 2909199961 is about 1427.5495485514.

The spelling of 2909199961 in words is "two billion, nine hundred nine million, one hundred ninety-nine thousand, nine hundred sixty-one".