9981711 has 12 divisors (see below), whose sum is σ = 14952392. Its totient is φ = 6654312.

The previous prime is 9981691. The next prime is 9981731. The reversal of 9981711 is 1171899.

9981711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9981691) and next prime (9981731).

It is not a de Polignac number, because 9981711 - 2⁹ = 9981199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981731) 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, 20296 + ... + 20781.

Almost surely, 2^9981711 is an apocalyptic number.

9981711 is a deficient number, since it is larger than the sum of its proper divisors (4970681).

9981711 is an equidigital number, since it uses as much as digits as its factorization.

9981711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41092 (or 41080 counting only the distinct ones).

The product of its digits is 4536, while the sum is 36.

The square root of 9981711 is about 3159.3845919736. The cubic root of 9981711 is about 215.3120473314.

It can be divided in two parts, 99 and 81711, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 9981711 in words is "nine million, nine hundred eighty-one thousand, seven hundred eleven".