1689907 has 2 divisors, whose sum is σ = 1689908. Its totient is φ = 1689906.

The previous prime is 1689893. The next prime is 1689911. The reversal of 1689907 is 7099861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1689907 - 2¹¹ = 1687859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1689907.

It is not a weakly prime, because it can be changed into another prime (1689967) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844953 + 844954.

It is an arithmetic number, because the mean of its divisors is an integer number (844954).

2^1689907 is an apocalyptic number.

1689907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689907 is an equidigital number, since it uses as much as digits as its factorization.

1689907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1689907 is about 1299.9642302771. The cubic root of 1689907 is about 119.1116575511. Note that the first 3 decimals are identical.

The spelling of 1689907 in words is "one million, six hundred eighty-nine thousand, nine hundred seven".