603981 has 12 divisors (see below), whose sum is σ = 997152. Its totient is φ = 345096.

The previous prime is 603949. The next prime is 603989. The reversal of 603981 is 189306.

It is not a de Polignac number, because 603981 - 2⁵ = 603949 is a prime.

It is a super-2 number, since 2×603981² = 729586096722, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 603981.

It is not an unprimeable number, because it can be changed into a prime (603989) 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 11 ways as a sum of consecutive naturals, for example, 4731 + ... + 4856.

It is an arithmetic number, because the mean of its divisors is an integer number (83096).

2⁶⁰³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

603981 is a deficient number, since it is larger than the sum of its proper divisors (393171).

603981 is a wasteful number, since it uses less digits than its factorization.

603981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9600 (or 9597 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 603981 is about 777.1621452438. The cubic root of 603981 is about 84.5293946729.

The spelling of 603981 in words is "six hundred three thousand, nine hundred eighty-one".