440603981 has 2 divisors, whose sum is σ = 440603982. Its totient is φ = 440603980.

The previous prime is 440603971. The next prime is 440604013. The reversal of 440603981 is 189306044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411075625 + 29528356 = 20275^2 + 5434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440603981 is a prime.

It is a super-2 number, since 2×440603981² = 388263736146096722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440603921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220301990 + 220301991.

It is an arithmetic number, because the mean of its divisors is an integer number (220301991).

Almost surely, 2^440603981 is an apocalyptic number.

It is an amenable number.

440603981 is a deficient number, since it is larger than the sum of its proper divisors (1).

440603981 is an equidigital number, since it uses as much as digits as its factorization.

440603981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 440603981 is about 20990.5688584183. The cubic root of 440603981 is about 760.9383498573.

The spelling of 440603981 in words is "four hundred forty million, six hundred three thousand, nine hundred eighty-one".