2961930809 has 2 divisors, whose sum is σ = 2961930810. Its totient is φ = 2961930808.

The previous prime is 2961930787. The next prime is 2961930887. The reversal of 2961930809 is 9080391692.

2961930809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2430490000 + 531440809 = 49300^2 + 23053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2961930809 is a prime.

It is not a weakly prime, because it can be changed into another prime (2961930889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1480965404 + 1480965405.

It is an arithmetic number, because the mean of its divisors is an integer number (1480965405).

Almost surely, 2^2961930809 is an apocalyptic number.

It is an amenable number.

2961930809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2961930809 is an equidigital number, since it uses as much as digits as its factorization.

2961930809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 2961930809 is about 54423.6236298172. The cubic root of 2961930809 is about 1436.1229958623.

The spelling of 2961930809 in words is "two billion, nine hundred sixty-one million, nine hundred thirty thousand, eight hundred nine".