2105612939 has 2 divisors, whose sum is σ = 2105612940. Its totient is φ = 2105612938.

The previous prime is 2105612897. The next prime is 2105613049. The reversal of 2105612939 is 9392165012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105612939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105614939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052806469 + 1052806470.

It is an arithmetic number, because the mean of its divisors is an integer number (1052806470).

Almost surely, 2^2105612939 is an apocalyptic number.

2105612939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105612939 is an equidigital number, since it uses as much as digits as its factorization.

2105612939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 2105612939 is about 45886.9582670283. The cubic root of 2105612939 is about 1281.7190726543.

The spelling of 2105612939 in words is "two billion, one hundred five million, six hundred twelve thousand, nine hundred thirty-nine".