2102089889 has 2 divisors, whose sum is σ = 2102089890. Its totient is φ = 2102089888.

The previous prime is 2102089877. The next prime is 2102089919. The reversal of 2102089889 is 9889802012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1169092864 + 932997025 = 34192^2 + 30545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102089889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2102089849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051044944 + 1051044945.

It is an arithmetic number, because the mean of its divisors is an integer number (1051044945).

Almost surely, 2^2102089889 is an apocalyptic number.

It is an amenable number.

2102089889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102089889 is an equidigital number, since it uses as much as digits as its factorization.

2102089889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 2102089889 is about 45848.5538376076. The cubic root of 2102089889 is about 1281.0038286394.

The spelling of 2102089889 in words is "two billion, one hundred two million, eighty-nine thousand, eight hundred eighty-nine".