2102809559 has 2 divisors, whose sum is σ = 2102809560. Its totient is φ = 2102809558.

The previous prime is 2102809531. The next prime is 2102809601. The reversal of 2102809559 is 9559082012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102809559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102809519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051404779 + 1051404780.

It is an arithmetic number, because the mean of its divisors is an integer number (1051404780).

Almost surely, 2^2102809559 is an apocalyptic number.

2102809559 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102809559 is an equidigital number, since it uses as much as digits as its factorization.

2102809559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 2102809559 is about 45856.4015051334. The cubic root of 2102809559 is about 1281.1499998130.

The spelling of 2102809559 in words is "two billion, one hundred two million, eight hundred nine thousand, five hundred fifty-nine".