1668029 has 16 divisors (see below), whose sum is σ = 2004480. Its totient is φ = 1370160.

The previous prime is 1668019. The next prime is 1668031. The reversal of 1668029 is 9208661.

It is not a de Polignac number, because 1668029 - 2⁸ = 1667773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1667986 and 1668004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4634 + ... + 4980.

It is an arithmetic number, because the mean of its divisors is an integer number (125280).

2^1668029 is an apocalyptic number.

1668029 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1668029 is a deficient number, since it is larger than the sum of its proper divisors (336451).

1668029 is a wasteful number, since it uses less digits than its factorization.

1668029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1668029 is about 1291.5219703900. The cubic root of 1668029 is about 118.5954058472.

The spelling of 1668029 in words is "one million, six hundred sixty-eight thousand, twenty-nine".