9963961 has 12 divisors (see below), whose sum is σ = 12021312. Its totient is φ = 8088984.

The previous prime is 9963959. The next prime is 9963973. The reversal of 9963961 is 1693699.

It is not a de Polignac number, because 9963961 - 2¹ = 9963959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9963931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556 + ... + 4498.

It is an arithmetic number, because the mean of its divisors is an integer number (1001776).

Almost surely, 2^9963961 is an apocalyptic number.

It is an amenable number.

9963961 is a deficient number, since it is larger than the sum of its proper divisors (2057351).

9963961 is a wasteful number, since it uses less digits than its factorization.

9963961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988 (or 3969 counting only the distinct ones).

The product of its digits is 78732, while the sum is 43.

The square root of 9963961 is about 3156.5742506711. The cubic root of 9963961 is about 215.1843452287.

The spelling of 9963961 in words is "nine million, nine hundred sixty-three thousand, nine hundred sixty-one".