1696649 has 2 divisors, whose sum is σ = 1696650. Its totient is φ = 1696648.

The previous prime is 1696609. The next prime is 1696657. The reversal of 1696649 is 9466961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123600 + 573049 = 1060^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1696649 - 2²⁰ = 648073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1696609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848324 + 848325.

It is an arithmetic number, because the mean of its divisors is an integer number (848325).

2^1696649 is an apocalyptic number.

It is an amenable number.

1696649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1696649 is an equidigital number, since it uses as much as digits as its factorization.

1696649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 1696649 is about 1302.5547973118. The cubic root of 1696649 is about 119.2698487442.

The spelling of 1696649 in words is "one million, six hundred ninety-six thousand, six hundred forty-nine".