9878951 has 4 divisors (see below), whose sum is σ = 9902304. Its totient is φ = 9855600.

The previous prime is 9878929. The next prime is 9879007. The reversal of 9878951 is 1598789.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9878951 is a prime.

It is a d-powerful number, because it can be written as 9 + 8⁷ + 7⁷ + 8⁷ + 9⁷ + 5⁷ + 1 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9878896 and 9878905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878051) 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, 11030 + ... + 11891.

It is an arithmetic number, because the mean of its divisors is an integer number (2475576).

Almost surely, 2^9878951 is an apocalyptic number.

9878951 is a deficient number, since it is larger than the sum of its proper divisors (23353).

9878951 is a wasteful number, since it uses less digits than its factorization.

9878951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23352.

The product of its digits is 181440, while the sum is 47.

The square root of 9878951 is about 3143.0798589918. The cubic root of 9878951 is about 214.5706303809.

The spelling of 9878951 in words is "nine million, eight hundred seventy-eight thousand, nine hundred fifty-one".