1669849039 has 2 divisors, whose sum is σ = 1669849040. Its totient is φ = 1669849038.

The previous prime is 1669849003. The next prime is 1669849043. The reversal of 1669849039 is 9309489661.

It is a strong prime.

It is an emirp because it is prime and its reverse (9309489661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1669849039 - 2⁷ = 1669848911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1669849079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834924519 + 834924520.

It is an arithmetic number, because the mean of its divisors is an integer number (834924520).

Almost surely, 2^1669849039 is an apocalyptic number.

1669849039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669849039 is an equidigital number, since it uses as much as digits as its factorization.

1669849039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 1669849039 is about 40863.7864006751. The cubic root of 1669849039 is about 1186.3852456297.

The spelling of 1669849039 in words is "one billion, six hundred sixty-nine million, eight hundred forty-nine thousand, thirty-nine".