2100812839 has 2 divisors, whose sum is σ = 2100812840. Its totient is φ = 2100812838.

The previous prime is 2100812821. The next prime is 2100812873. The reversal of 2100812839 is 9382180012.

It is an a-pointer prime, because the next prime (2100812873) can be obtained adding 2100812839 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100812839 - 2⁵ = 2100812807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100812639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050406419 + 1050406420.

It is an arithmetic number, because the mean of its divisors is an integer number (1050406420).

Almost surely, 2^2100812839 is an apocalyptic number.

2100812839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100812839 is an equidigital number, since it uses as much as digits as its factorization.

2100812839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 2100812839 is about 45834.6248921053. The cubic root of 2100812839 is about 1280.7443666410.

The spelling of 2100812839 in words is "two billion, one hundred million, eight hundred twelve thousand, eight hundred thirty-nine".