9964191 has 8 divisors (see below), whose sum is σ = 13454080. Its totient is φ = 6558552.

The previous prime is 9964187. The next prime is 9964217. The reversal of 9964191 is 1914699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9964191 - 2² = 9964187 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 (9964111) 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 7 ways as a sum of consecutive naturals, for example, 20785 + ... + 21258.

It is an arithmetic number, because the mean of its divisors is an integer number (1681760).

Almost surely, 2^9964191 is an apocalyptic number.

9964191 is a deficient number, since it is larger than the sum of its proper divisors (3489889).

9964191 is a wasteful number, since it uses less digits than its factorization.

9964191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42125.

The product of its digits is 17496, while the sum is 39.

The square root of 9964191 is about 3156.6106823617. The cubic root of 9964191 is about 215.1860009297.

The spelling of 9964191 in words is "nine million, nine hundred sixty-four thousand, one hundred ninety-one".