2091209017 has 2 divisors, whose sum is σ = 2091209018. Its totient is φ = 2091209016.

The previous prime is 2091209011. The next prime is 2091209069. The reversal of 2091209017 is 7109021902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2016369216 + 74839801 = 44904^2 + 8651^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091209017 - 2³ = 2091209009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2091209017.

It is not a weakly prime, because it can be changed into another prime (2091209011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045604508 + 1045604509.

It is an arithmetic number, because the mean of its divisors is an integer number (1045604509).

Almost surely, 2^2091209017 is an apocalyptic number.

It is an amenable number.

2091209017 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091209017 is an equidigital number, since it uses as much as digits as its factorization.

2091209017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 2091209017 is about 45729.7388687056. The cubic root of 2091209017 is about 1278.7897530790.

The spelling of 2091209017 in words is "two billion, ninety-one million, two hundred nine thousand, seventeen".