603989 has 2 divisors, whose sum is σ = 603990. Its totient is φ = 603988.

The previous prime is 603949. The next prime is 604001. The reversal of 603989 is 989306.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600625 + 3364 = 775^2 + 58^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-603989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (603919) 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, 301994 + 301995.

It is an arithmetic number, because the mean of its divisors is an integer number (301995).

2⁶⁰³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

603989 is a deficient number, since it is larger than the sum of its proper divisors (1).

603989 is an equidigital number, since it uses as much as digits as its factorization.

603989 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 35.

The square root of 603989 is about 777.1672921579. The cubic root of 603989 is about 84.5297678812.

The spelling of 603989 in words is "six hundred three thousand, nine hundred eighty-nine".