981081963 has 20 divisors (see below), whose sum is σ = 1467125968. Its totient is φ = 653358960.

The previous prime is 981081947. The next prime is 981082027. The reversal of 981081963 is 369180189.

It is not a de Polignac number, because 981081963 - 2⁴ = 981081947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981081263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 76770 + ... + 88632.

Almost surely, 2^981081963 is an apocalyptic number.

981081963 is a deficient number, since it is larger than the sum of its proper divisors (486044005).

981081963 is a wasteful number, since it uses less digits than its factorization.

981081963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12896 (or 12887 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 981081963 is about 31322.2279379996. The cubic root of 981081963 is about 993.6537985906.

The spelling of 981081963 in words is "nine hundred eighty-one million, eighty-one thousand, nine hundred sixty-three".