1668031 has 2 divisors, whose sum is σ = 1668032. Its totient is φ = 1668030.

The previous prime is 1668019. The next prime is 1668053. The reversal of 1668031 is 1308661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1668031 - 2¹⁷ = 1536959 is a prime.

It is a super-2 number, since 2×1668031² = 5564654833922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1667987 and 1668005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834015 + 834016.

It is an arithmetic number, because the mean of its divisors is an integer number (834016).

2^1668031 is an apocalyptic number.

1668031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668031 is an equidigital number, since it uses as much as digits as its factorization.

1668031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1668031 is about 1291.5227446700. The cubic root of 1668031 is about 118.5954532466.

The spelling of 1668031 in words is "one million, six hundred sixty-eight thousand, thirty-one".