694609 has 2 divisors, whose sum is σ = 694610. Its totient is φ = 694608.

The previous prime is 694597. The next prime is 694619. The reversal of 694609 is 906496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 685584 + 9025 = 828^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 694609 - 2⁷ = 694481 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (694619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347304 + 347305.

It is an arithmetic number, because the mean of its divisors is an integer number (347305).

2⁶⁹⁴⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

694609 is a deficient number, since it is larger than the sum of its proper divisors (1).

694609 is an equidigital number, since it uses as much as digits as its factorization.

694609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 694609 is about 833.4320608184. The cubic root of 694609 is about 88.5618748677.

The spelling of 694609 in words is "six hundred ninety-four thousand, six hundred nine".