1669669039 has 2 divisors, whose sum is σ = 1669669040. Its totient is φ = 1669669038.

The previous prime is 1669669009. The next prime is 1669669073. The reversal of 1669669039 is 9309669661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1669669039 - 2²¹ = 1667571887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1669669009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834834519 + 834834520.

It is an arithmetic number, because the mean of its divisors is an integer number (834834520).

Almost surely, 2^1669669039 is an apocalyptic number.

1669669039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669669039 is an equidigital number, since it uses as much as digits as its factorization.

1669669039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2834352, while the sum is 55.

The square root of 1669669039 is about 40861.5839022425. The cubic root of 1669669039 is about 1186.3426156248.

The spelling of 1669669039 in words is "one billion, six hundred sixty-nine million, six hundred sixty-nine thousand, thirty-nine".