9871951 has 6 divisors (see below), whose sum is σ = 10487120. Its totient is φ = 9290976.

The previous prime is 9871949. The next prime is 9871957. The reversal of 9871951 is 1591789.

It is a happy number.

9871951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9871951 - 2¹ = 9871949 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 (9871957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16791 + ... + 17368.

Almost surely, 2^9871951 is an apocalyptic number.

9871951 is a deficient number, since it is larger than the sum of its proper divisors (615169).

9871951 is a wasteful number, since it uses less digits than its factorization.

9871951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34193 (or 34176 counting only the distinct ones).

The product of its digits is 22680, while the sum is 40.

The square root of 9871951 is about 3141.9661042093. The cubic root of 9871951 is about 214.5199384498.

The spelling of 9871951 in words is "nine million, eight hundred seventy-one thousand, nine hundred fifty-one".