1669099 has 2 divisors, whose sum is σ = 1669100. Its totient is φ = 1669098.

The previous prime is 1669097. The next prime is 1669103. The reversal of 1669099 is 9909661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1669099 - 2¹ = 1669097 is a prime.

Together with 1669097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1669091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834549 + 834550.

It is an arithmetic number, because the mean of its divisors is an integer number (834550).

2^1669099 is an apocalyptic number.

1669099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669099 is an equidigital number, since it uses as much as digits as its factorization.

1669099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 1669099 is about 1291.9361439328. The cubic root of 1669099 is about 118.6207591154.

The spelling of 1669099 in words is "one million, six hundred sixty-nine thousand, ninety-nine".