1669813229 has 6 divisors (see below), whose sum is σ = 1942435854. Its totient is φ = 1431268440.

The previous prime is 1669813141. The next prime is 1669813261. The reversal of 1669813229 is 9223189661.

It can be written as a sum of positive squares in only one way, i.e., 1599840004 + 69973225 = 39998^2 + 8365^2 .

It is not a de Polignac number, because 1669813229 - 2¹² = 1669809133 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 (1669813279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17038862 + ... + 17038959.

It is an arithmetic number, because the mean of its divisors is an integer number (323739309).

Almost surely, 2^1669813229 is an apocalyptic number.

It is an amenable number.

1669813229 is a deficient number, since it is larger than the sum of its proper divisors (272622625).

1669813229 is an equidigital number, since it uses as much as digits as its factorization.

1669813229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34077835 (or 34077828 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 1669813229 is about 40863.3482353074. The cubic root of 1669813229 is about 1186.3767648712.

The spelling of 1669813229 in words is "one billion, six hundred sixty-nine million, eight hundred thirteen thousand, two hundred twenty-nine".