9981263 has 4 divisors (see below), whose sum is σ = 9996768. Its totient is φ = 9965760.

The previous prime is 9981229. The next prime is 9981271. The reversal of 9981263 is 3621899.

9981263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3621899 = 41 ⋅88339.

It is a cyclic number.

It is not a de Polignac number, because 9981263 - 2⁶ = 9981199 is a prime.

It is a super-4 number, since 4×9981263⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6743 + ... + 8088.

It is an arithmetic number, because the mean of its divisors is an integer number (2499192).

Almost surely, 2^9981263 is an apocalyptic number.

9981263 is a deficient number, since it is larger than the sum of its proper divisors (15505).

9981263 is a wasteful number, since it uses less digits than its factorization.

9981263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15504.

The product of its digits is 23328, while the sum is 38.

The square root of 9981263 is about 3159.3136912944. The cubic root of 9981263 is about 215.3088260654.

The spelling of 9981263 in words is "nine million, nine hundred eighty-one thousand, two hundred sixty-three".