9878775 has 24 divisors (see below), whose sum is σ = 16498944. Its totient is φ = 5215200.

The previous prime is 9878773. The next prime is 9878797. The reversal of 9878775 is 5778789.

It is not a de Polignac number, because 9878775 - 2¹ = 9878773 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7410 + ... + 8640.

It is an arithmetic number, because the mean of its divisors is an integer number (687456).

Almost surely, 2^9878775 is an apocalyptic number.

9878775 is a deficient number, since it is larger than the sum of its proper divisors (6620169).

9878775 is a wasteful number, since it uses less digits than its factorization.

9878775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351 (or 1346 counting only the distinct ones).

The product of its digits is 987840, while the sum is 51.

The square root of 9878775 is about 3143.0518608512. The cubic root of 9878775 is about 214.5693561345.

The spelling of 9878775 in words is "nine million, eight hundred seventy-eight thousand, seven hundred seventy-five".