9886396639 has 4 divisors (see below), whose sum is σ = 11298739024. Its totient is φ = 8474054256.

The previous prime is 9886396627. The next prime is 9886396739. The reversal of 9886396639 is 9366936889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9366936889 = 607 ⋅15431527.

It is a cyclic number.

It is not a de Polignac number, because 9886396639 - 2²⁹ = 9349525727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9886396609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706171182 + ... + 706171195.

It is an arithmetic number, because the mean of its divisors is an integer number (2824684756).

Almost surely, 2^9886396639 is an apocalyptic number.

9886396639 is a deficient number, since it is larger than the sum of its proper divisors (1412342385).

9886396639 is a wasteful number, since it uses less digits than its factorization.

9886396639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412342384.

The product of its digits is 90699264, while the sum is 67.

The square root of 9886396639 is about 99430.3607506279. The cubic root of 9886396639 is about 2146.2452322353.

The spelling of 9886396639 in words is "nine billion, eight hundred eighty-six million, three hundred ninety-six thousand, six hundred thirty-nine".