1669612829 has 2 divisors, whose sum is σ = 1669612830. Its totient is φ = 1669612828.

The previous prime is 1669612807. The next prime is 1669612873. The reversal of 1669612829 is 9282169661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030281604 + 639331225 = 32098^2 + 25285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1669612829 is a prime.

It is a super-2 number, since 2×1669612829² = 5575213997522766482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1669611829) 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 as a sum of consecutive naturals, namely, 834806414 + 834806415.

It is an arithmetic number, because the mean of its divisors is an integer number (834806415).

Almost surely, 2^1669612829 is an apocalyptic number.

It is an amenable number.

1669612829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669612829 is an equidigital number, since it uses as much as digits as its factorization.

1669612829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 50.

The square root of 1669612829 is about 40860.8960866009. The cubic root of 1669612829 is about 1186.3293025939.

The spelling of 1669612829 in words is "one billion, six hundred sixty-nine million, six hundred twelve thousand, eight hundred twenty-nine".