9871394869 has 4 divisors (see below), whose sum is σ = 11281594144. Its totient is φ = 8461195596.

The previous prime is 9871394857. The next prime is 9871394873. The reversal of 9871394869 is 9684931789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9871394869 - 2¹⁷ = 9871263797 is a prime.

It is a super-2 number, since 2×9871394869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9871394869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9871364869) 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 in 3 ways as a sum of consecutive naturals, for example, 705099627 + ... + 705099640.

It is an arithmetic number, because the mean of its divisors is an integer number (2820398536).

Almost surely, 2^9871394869 is an apocalyptic number.

It is an amenable number.

9871394869 is a deficient number, since it is larger than the sum of its proper divisors (1410199275).

9871394869 is a wasteful number, since it uses less digits than its factorization.

9871394869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410199274.

The product of its digits is 23514624, while the sum is 64.

The square root of 9871394869 is about 99354.8935332327. The cubic root of 9871394869 is about 2145.1591008602.

The spelling of 9871394869 in words is "nine billion, eight hundred seventy-one million, three hundred ninety-four thousand, eight hundred sixty-nine".