2123906831 has 2 divisors, whose sum is σ = 2123906832. Its totient is φ = 2123906830.

The previous prime is 2123906801. The next prime is 2123906867. The reversal of 2123906831 is 1386093212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123906831 - 2¹⁰ = 2123905807 is a prime.

It is a super-2 number, since 2×2123906831² = 9021960453536925122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2123906791 and 2123906800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123906801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061953415 + 1061953416.

It is an arithmetic number, because the mean of its divisors is an integer number (1061953416).

Almost surely, 2^2123906831 is an apocalyptic number.

2123906831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123906831 is an equidigital number, since it uses as much as digits as its factorization.

2123906831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2123906831 is about 46085.8636785728. The cubic root of 2123906831 is about 1285.4202990578.

The spelling of 2123906831 in words is "two billion, one hundred twenty-three million, nine hundred six thousand, eight hundred thirty-one".