9871431 has 8 divisors (see below), whose sum is σ = 13854720. Its totient is φ = 6234552.

The previous prime is 9871429. The next prime is 9871471. The reversal of 9871431 is 1341789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9871431 - 2¹ = 9871429 is a prime.

It is a super-2 number, since 2×9871431² = 194890299975522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9871392 and 9871401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9871471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86535 + ... + 86648.

It is an arithmetic number, because the mean of its divisors is an integer number (1731840).

Almost surely, 2^9871431 is an apocalyptic number.

9871431 is a deficient number, since it is larger than the sum of its proper divisors (3983289).

9871431 is a wasteful number, since it uses less digits than its factorization.

9871431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173205.

The product of its digits is 6048, while the sum is 33.

The square root of 9871431 is about 3141.8833523860. The cubic root of 9871431 is about 214.5161718074.

The spelling of 9871431 in words is "nine million, eight hundred seventy-one thousand, four hundred thirty-one".