1678331 has 2 divisors, whose sum is σ = 1678332. Its totient is φ = 1678330.

The previous prime is 1678321. The next prime is 1678337. The reversal of 1678331 is 1338761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1678331 - 2⁶ = 1678267 is a prime.

It is a super-3 number, since 3×1678331³ = 14182542833335016073, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1678294 and 1678303.

It is not a weakly prime, because it can be changed into another prime (1678337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839165 + 839166.

It is an arithmetic number, because the mean of its divisors is an integer number (839166).

2^1678331 is an apocalyptic number.

1678331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678331 is an equidigital number, since it uses as much as digits as its factorization.

1678331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 1678331 is about 1295.5041489706. The cubic root of 1678331 is about 118.8390593223.

The spelling of 1678331 in words is "one million, six hundred seventy-eight thousand, three hundred thirty-one".