9963491 has 4 divisors (see below), whose sum is σ = 10000800. Its totient is φ = 9926184.

The previous prime is 9963469. The next prime is 9963497. The reversal of 9963491 is 1943699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9963491 - 2¹⁸ = 9701347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9963497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18251 + ... + 18788.

It is an arithmetic number, because the mean of its divisors is an integer number (2500200).

Almost surely, 2^9963491 is an apocalyptic number.

9963491 is a deficient number, since it is larger than the sum of its proper divisors (37309).

9963491 is a wasteful number, since it uses less digits than its factorization.

9963491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37308.

The product of its digits is 52488, while the sum is 41.

The square root of 9963491 is about 3156.4998019959. The cubic root of 9963491 is about 215.1809617606.

The spelling of 9963491 in words is "nine million, nine hundred sixty-three thousand, four hundred ninety-one".