9878797 has 2 divisors, whose sum is σ = 9878798. Its totient is φ = 9878796.

The previous prime is 9878773. The next prime is 9878839. The reversal of 9878797 is 7978789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7257636 + 2621161 = 2694^2 + 1619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9878797 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9878747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4939398 + 4939399.

It is an arithmetic number, because the mean of its divisors is an integer number (4939399).

Almost surely, 2^9878797 is an apocalyptic number.

It is an amenable number.

9878797 is a deficient number, since it is larger than the sum of its proper divisors (1).

9878797 is an equidigital number, since it uses as much as digits as its factorization.

9878797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 55.

The square root of 9878797 is about 3143.0553606324. The cubic root of 9878797 is about 214.5695154161.

The spelling of 9878797 in words is "nine million, eight hundred seventy-eight thousand, seven hundred ninety-seven".