9963845 has 4 divisors (see below), whose sum is σ = 11956620. Its totient is φ = 7971072.

The previous prime is 9963839. The next prime is 9963871. The reversal of 9963845 is 5483699.

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 3976036 + 5987809 = 1994^2 + 2447^2 .

It is a cyclic number.

It is not a de Polignac number, because 9963845 - 2⁴ = 9963829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9963796 and 9963805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996380 + ... + 996389.

It is an arithmetic number, because the mean of its divisors is an integer number (2989155).

Almost surely, 2^9963845 is an apocalyptic number.

It is an amenable number.

9963845 is a deficient number, since it is larger than the sum of its proper divisors (1992775).

9963845 is a wasteful number, since it uses less digits than its factorization.

9963845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992774.

The product of its digits is 233280, while the sum is 44.

The square root of 9963845 is about 3156.5558762677. Note that the first 3 decimals coincide. The cubic root of 9963845 is about 215.1835101699.

The spelling of 9963845 in words is "nine million, nine hundred sixty-three thousand, eight hundred forty-five".