1684231 has 2 divisors, whose sum is σ = 1684232. Its totient is φ = 1684230.

The previous prime is 1684229. The next prime is 1684237. The reversal of 1684231 is 1324861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1684231 - 2¹ = 1684229 is a prime.

It is a super-2 number, since 2×1684231² = 5673268122722, which contains 22 as substring.

Together with 1684229, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8³ + 4⁶ + 2 + 3 + 1 .

It is a junction number, because it is equal to n+sod(n) for n = 1684196 and 1684205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684237) 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, 842115 + 842116.

It is an arithmetic number, because the mean of its divisors is an integer number (842116).

2^1684231 is an apocalyptic number.

1684231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684231 is an equidigital number, since it uses as much as digits as its factorization.

1684231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 1684231 is about 1297.7792570387. The cubic root of 1684231 is about 118.9781519573.

The spelling of 1684231 in words is "one million, six hundred eighty-four thousand, two hundred thirty-one".