2105210993 has 2 divisors, whose sum is σ = 2105210994. Its totient is φ = 2105210992.

The previous prime is 2105210971. The next prime is 2105211049. The reversal of 2105210993 is 3990125012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1271849569 + 833361424 = 35663^2 + 28868^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105210993 - 2²⁴ = 2088433777 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 (2105210593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052605496 + 1052605497.

It is an arithmetic number, because the mean of its divisors is an integer number (1052605497).

Almost surely, 2^2105210993 is an apocalyptic number.

It is an amenable number.

2105210993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105210993 is an equidigital number, since it uses as much as digits as its factorization.

2105210993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 2105210993 is about 45882.5783168296. The cubic root of 2105210993 is about 1281.6375105543.

The spelling of 2105210993 in words is "two billion, one hundred five million, two hundred ten thousand, nine hundred ninety-three".