2102099689 has 2 divisors, whose sum is σ = 2102099690. Its totient is φ = 2102099688.

The previous prime is 2102099687. The next prime is 2102099761. The reversal of 2102099689 is 9869902012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2049101289 + 52998400 = 45267^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102099689 - 2¹ = 2102099687 is a prime.

Together with 2102099687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2102099683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051049844 + 1051049845.

It is an arithmetic number, because the mean of its divisors is an integer number (1051049845).

Almost surely, 2^2102099689 is an apocalyptic number.

It is an amenable number.

2102099689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102099689 is an equidigital number, since it uses as much as digits as its factorization.

2102099689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 2102099689 is about 45848.6607110829. The cubic root of 2102099689 is about 1281.0058193278.

The spelling of 2102099689 in words is "two billion, one hundred two million, ninety-nine thousand, six hundred eighty-nine".