1669869001 has 2 divisors, whose sum is σ = 1669869002. Its totient is φ = 1669869000.

The previous prime is 1669868999. The next prime is 1669869007. The reversal of 1669869001 is 1009689661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 910590976 + 759278025 = 30176^2 + 27555^2 .

It is an emirp because it is prime and its reverse (1009689661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1006986991 and 1996896001.

It is a cyclic number.

It is not a de Polignac number, because 1669869001 - 2¹ = 1669868999 is a prime.

Together with 1669868999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1669869007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834934500 + 834934501.

It is an arithmetic number, because the mean of its divisors is an integer number (834934501).

Almost surely, 2^1669869001 is an apocalyptic number.

It is an amenable number.

1669869001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669869001 is an equidigital number, since it uses as much as digits as its factorization.

1669869001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 1669869001 is about 40864.0306504388. The cubic root of 1669869001 is about 1186.3899731085.

The spelling of 1669869001 in words is "one billion, six hundred sixty-nine million, eight hundred sixty-nine thousand, one".