9870505 has 8 divisors (see below), whose sum is σ = 11925000. Its totient is φ = 7842816.

The previous prime is 9870503. The next prime is 9870541. The reversal of 9870505 is 5050789.

9870505 = 989² + 990² + ... + 998².

9870505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4624 + 9865881 = 68^2 + 3141^2 .

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 9870505 - 2¹ = 9870503 is a prime.

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

9870505 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9870503) 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, 5880 + ... + 7369.

It is an arithmetic number, because the mean of its divisors is an integer number (1490625).

Almost surely, 2^9870505 is an apocalyptic number.

It is an amenable number.

9870505 is a deficient number, since it is larger than the sum of its proper divisors (2054495).

9870505 is a wasteful number, since it uses less digits than its factorization.

9870505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13403.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 9870505 is about 3141.7359850885. The cubic root of 9870505 is about 214.5094639590.

The spelling of 9870505 in words is "nine million, eight hundred seventy thousand, five hundred five".