9878781 has 8 divisors (see below), whose sum is σ = 14369184. Its totient is φ = 5987120.

The previous prime is 9878773. The next prime is 9878797. The reversal of 9878781 is 1878789.

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

It is a cyclic number.

It is not a de Polignac number, because 9878781 - 2³ = 9878773 is a prime.

It is a super-2 number, since 2×9878781² = 195180628091922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 9878781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878731) 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, 149646 + ... + 149711.

It is an arithmetic number, because the mean of its divisors is an integer number (1796148).

Almost surely, 2^9878781 is an apocalyptic number.

It is an amenable number.

9878781 is a deficient number, since it is larger than the sum of its proper divisors (4490403).

9878781 is a wasteful number, since it uses less digits than its factorization.

9878781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299371.

The product of its digits is 225792, while the sum is 48.

The square root of 9878781 is about 3143.0528153373. The cubic root of 9878781 is about 214.5693995749.

The spelling of 9878781 in words is "nine million, eight hundred seventy-eight thousand, seven hundred eighty-one".