1669894429 has 8 divisors (see below), whose sum is σ = 1909029888. Its totient is φ = 1430903760.

The previous prime is 1669894427. The next prime is 1669894441. The reversal of 1669894429 is 9244989661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1669894429 - 2¹ = 1669894427 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669894427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10237 + ... + 58690.

It is an arithmetic number, because the mean of its divisors is an integer number (238628736).

Almost surely, 2^1669894429 is an apocalyptic number.

It is an amenable number.

1669894429 is a deficient number, since it is larger than the sum of its proper divisors (239135459).

1669894429 is an equidigital number, since it uses as much as digits as its factorization.

1669894429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72395.

The product of its digits is 6718464, while the sum is 58.

The square root of 1669894429 is about 40864.3417786216. The cubic root of 1669894429 is about 1186.3959950122.

The spelling of 1669894429 in words is "one billion, six hundred sixty-nine million, eight hundred ninety-four thousand, four hundred twenty-nine".