2990305817 has 2 divisors, whose sum is σ = 2990305818. Its totient is φ = 2990305816.

The previous prime is 2990305783. The next prime is 2990305853. The reversal of 2990305817 is 7185030992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2968506256 + 21799561 = 54484^2 + 4669^2 .

It is a cyclic number.

It is not a de Polignac number, because 2990305817 - 2²⁰ = 2989257241 is a prime.

It is not a weakly prime, because it can be changed into another prime (2990302817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495152908 + 1495152909.

It is an arithmetic number, because the mean of its divisors is an integer number (1495152909).

Almost surely, 2^2990305817 is an apocalyptic number.

It is an amenable number.

2990305817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2990305817 is an equidigital number, since it uses as much as digits as its factorization.

2990305817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 2990305817 is about 54683.6887654811. The cubic root of 2990305817 is about 1440.6944016186.

The spelling of 2990305817 in words is "two billion, nine hundred ninety million, three hundred five thousand, eight hundred seventeen".