1669697 has 2 divisors, whose sum is σ = 1669698. Its totient is φ = 1669696.

The previous prime is 1669687. The next prime is 1669727. The reversal of 1669697 is 7969661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1635841 + 33856 = 1279^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669697 - 2⁸ = 1669441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1669627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834848 + 834849.

It is an arithmetic number, because the mean of its divisors is an integer number (834849).

2^1669697 is an apocalyptic number.

It is an amenable number.

1669697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669697 is an equidigital number, since it uses as much as digits as its factorization.

1669697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 1669697 is about 1292.1675587941. The cubic root of 1669697 is about 118.6349237923.

The spelling of 1669697 in words is "one million, six hundred sixty-nine thousand, six hundred ninety-seven".