9860239897 has 4 divisors (see below), whose sum is σ = 10021883236. Its totient is φ = 9698596560.

The previous prime is 9860239889. The next prime is 9860239931. The reversal of 9860239897 is 7989320689.

It is a happy number.

9860239897 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1992372496 + 7867867401 = 44636^2 + 88701^2 .

It is a cyclic number.

It is not a de Polignac number, because 9860239897 - 2³ = 9860239889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61), and also a Moran number because the ratio is a prime number: 161643277 = 9860239897 / (9 + 8 + 6 + 0 + 2 + 3 + 9 + 8 + 9 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9860239397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80821578 + ... + 80821699.

It is an arithmetic number, because the mean of its divisors is an integer number (2505470809).

Almost surely, 2^9860239897 is an apocalyptic number.

It is an amenable number.

9860239897 is a deficient number, since it is larger than the sum of its proper divisors (161643339).

9860239897 is a wasteful number, since it uses less digits than its factorization.

9860239897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161643338.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The square root of 9860239897 is about 99298.7406617023. The cubic root of 9860239897 is about 2144.3507649478.

The spelling of 9860239897 in words is "nine billion, eight hundred sixty million, two hundred thirty-nine thousand, eight hundred ninety-seven".