9963889 has 4 divisors (see below), whose sum is σ = 10730356. Its totient is φ = 9197424.

The previous prime is 9963883. The next prime is 9963913. The reversal of 9963889 is 9883699.

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 5198400 + 4765489 = 2280^2 + 2183^2 .

It is a cyclic number.

It is not a de Polignac number, because 9963889 - 2¹¹ = 9961841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9963883) 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, 383214 + ... + 383239.

It is an arithmetic number, because the mean of its divisors is an integer number (2682589).

Almost surely, 2^9963889 is an apocalyptic number.

It is an amenable number.

9963889 is a deficient number, since it is larger than the sum of its proper divisors (766467).

9963889 is a wasteful number, since it uses less digits than its factorization.

9963889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766466.

The product of its digits is 839808, while the sum is 52.

The square root of 9963889 is about 3156.5628458816. The cubic root of 9963889 is about 215.1838269171.

The spelling of 9963889 in words is "nine million, nine hundred sixty-three thousand, eight hundred eighty-nine".