603961 has 4 divisors (see below), whose sum is σ = 613924. Its totient is φ = 594000.

The previous prime is 603949. The next prime is 603989. The reversal of 603961 is 169306.

603961 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169306 = 2 ⋅84653.

It can be written as a sum of positive squares in 2 ways, for example, as 295936 + 308025 = 544^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 603961 - 2⁷ = 603833 is a prime.

It is a deceptive number, since it divides R₆₀₃₉₆₀.

It is a Duffinian number.

603961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (603901) 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 in 3 ways as a sum of consecutive naturals, for example, 4890 + ... + 5011.

It is an arithmetic number, because the mean of its divisors is an integer number (153481).

2⁶⁰³⁹⁶¹ is an apocalyptic number.

603961 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

603961 is a deficient number, since it is larger than the sum of its proper divisors (9963).

603961 is an equidigital number, since it uses as much as digits as its factorization.

603961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9962.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 603961 is about 777.1492778096. The cubic root of 603961 is about 84.5284616377.

The spelling of 603961 in words is "six hundred three thousand, nine hundred sixty-one".