963981 has 12 divisors (see below), whose sum is σ = 1444352. Its totient is φ = 642492.

The previous prime is 963979. The next prime is 964009. The reversal of 963981 is 189369.

It is not a de Polignac number, because 963981 - 2¹ = 963979 is a prime.

It is a super-2 number, since 2×963981² = 1858518736722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

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 963981.

It is not an unprimeable number, because it can be changed into a prime (963901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1741 + ... + 2226.

2⁹⁶³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

963981 is a deficient number, since it is larger than the sum of its proper divisors (480371).

963981 is an equidigital number, since it uses as much as digits as its factorization.

963981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982 (or 3970 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 963981 is about 981.8253408830. The cubic root of 963981 is about 98.7846558916.

The spelling of 963981 in words is "nine hundred sixty-three thousand, nine hundred eighty-one".