1906831 has 2 divisors, whose sum is σ = 1906832. Its totient is φ = 1906830.

The previous prime is 1906829. The next prime is 1906843. The reversal of 1906831 is 1386091.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1906831 - 2¹ = 1906829 is a prime.

It is a super-2 number, since 2×1906831² = 7272008925122, which contains 22 as substring.

Together with 1906829, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1906831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1906811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953415 + 953416.

It is an arithmetic number, because the mean of its divisors is an integer number (953416).

2^1906831 is an apocalyptic number.

1906831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906831 is an equidigital number, since it uses as much as digits as its factorization.

1906831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1906831 is about 1380.8805161925. The cubic root of 1906831 is about 124.0044873506.

It can be divided in two parts, 190 and 6831, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 1906831 in words is "one million, nine hundred six thousand, eight hundred thirty-one".