9878501 has 4 divisors (see below), whose sum is σ = 9921132. Its totient is φ = 9835872.

The previous prime is 9878489. The next prime is 9878503. The reversal of 9878501 is 1058789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1058789 = 43 ⋅24623.

It can be written as a sum of positive squares in 2 ways, for example, as 3880900 + 5997601 = 1970^2 + 2449^2 .

It is a cyclic number.

It is not a de Polignac number, because 9878501 - 2¹⁰ = 9877477 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9878503) 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, 20966 + ... + 21431.

It is an arithmetic number, because the mean of its divisors is an integer number (2480283).

Almost surely, 2^9878501 is an apocalyptic number.

It is an amenable number.

9878501 is a deficient number, since it is larger than the sum of its proper divisors (42631).

9878501 is a wasteful number, since it uses less digits than its factorization.

9878501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42630.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 9878501 is about 3143.0082723404. The cubic root of 9878501 is about 214.5673723343.

The spelling of 9878501 in words is "nine million, eight hundred seventy-eight thousand, five hundred one".