1669134349 has 2 divisors, whose sum is σ = 1669134350. Its totient is φ = 1669134348.

The previous prime is 1669134347. The next prime is 1669134361. The reversal of 1669134349 is 9434319661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1038772900 + 630361449 = 32230^2 + 25107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669134349 - 2¹ = 1669134347 is a prime.

Together with 1669134347, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1669134299 and 1669134308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1669134347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834567174 + 834567175.

It is an arithmetic number, because the mean of its divisors is an integer number (834567175).

Almost surely, 2^1669134349 is an apocalyptic number.

It is an amenable number.

1669134349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669134349 is an equidigital number, since it uses as much as digits as its factorization.

1669134349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 1669134349 is about 40855.0406804350. The cubic root of 1669134349 is about 1186.2159651247.

It can be divided in two parts, 16691 and 34349, that added together give a triangular number (51040 = T₃₁₉).

The spelling of 1669134349 in words is "one billion, six hundred sixty-nine million, one hundred thirty-four thousand, three hundred forty-nine".