2086831 has 2 divisors, whose sum is σ = 2086832. Its totient is φ = 2086830.

The previous prime is 2086829. The next prime is 2086841. The reversal of 2086831 is 1386802.

2086831 = T₁₁₇₈ + T₁₁₇₉ + T₁₁₈₀.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2086831 - 2¹ = 2086829 is a prime.

It is a super-2 number, since 2×2086831² = 8709727245122, which contains 22 as substring.

Together with 2086829, it forms a pair of twin primes.

It is equal to p₁₅₄₉₀₉ and since 2086831 and 154909 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2086831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2086841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043415 + 1043416.

It is an arithmetic number, because the mean of its divisors is an integer number (1043416).

2^2086831 is an apocalyptic number.

2086831 is the 1180-th centered triangular number.

2086831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2086831 is an equidigital number, since it uses as much as digits as its factorization.

2086831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2086831 is about 1444.5867921312. The cubic root of 2086831 is about 127.7896733027.

The spelling of 2086831 in words is "two million, eighty-six thousand, eight hundred thirty-one".