9881731 has 4 divisors (see below), whose sum is σ = 10000872. Its totient is φ = 9762592.

The previous prime is 9881719. The next prime is 9881741. The reversal of 9881731 is 1371889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1371889 = 73 ⋅18793.

It is a cyclic number.

It is not a de Polignac number, because 9881731 - 2⁷ = 9881603 is a prime.

It is a super-2 number, since 2×9881731² = 195297215112722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9881741) 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, 59446 + ... + 59611.

It is an arithmetic number, because the mean of its divisors is an integer number (2500218).

Almost surely, 2^9881731 is an apocalyptic number.

9881731 is a deficient number, since it is larger than the sum of its proper divisors (119141).

9881731 is a wasteful number, since it uses less digits than its factorization.

9881731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119140.

The product of its digits is 12096, while the sum is 37.

The square root of 9881731 is about 3143.5220692720. The cubic root of 9881731 is about 214.5907556759.

The spelling of 9881731 in words is "nine million, eight hundred eighty-one thousand, seven hundred thirty-one".