9870139 has 8 divisors (see below), whose sum is σ = 10456640. Its totient is φ = 9290376.

The previous prime is 9870071. The next prime is 9870143. The reversal of 9870139 is 9310789.

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 9870139 - 2⁹ = 9869627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9870098 and 9870107.

It is not an unprimeable number, because it can be changed into a prime (9870199) 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, 1504 + ... + 4690.

It is an arithmetic number, because the mean of its divisors is an integer number (1307080).

Almost surely, 2^9870139 is an apocalyptic number.

9870139 is a deficient number, since it is larger than the sum of its proper divisors (586501).

9870139 is a wasteful number, since it uses less digits than its factorization.

9870139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 9870139 is about 3141.6777364969. The cubic root of 9870139 is about 214.5068125772.

The spelling of 9870139 in words is "nine million, eight hundred seventy thousand, one hundred thirty-nine".