9947491 has 8 divisors (see below), whose sum is σ = 10321520. Its totient is φ = 9580032.

The previous prime is 9947489. The next prime is 9947501. The reversal of 9947491 is 1947499.

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

It is a cyclic number.

It is not a de Polignac number, because 9947491 - 2¹ = 9947489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9947291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1555 + ... + 4723.

It is an arithmetic number, because the mean of its divisors is an integer number (1290190).

Almost surely, 2^9947491 is an apocalyptic number.

9947491 is a deficient number, since it is larger than the sum of its proper divisors (374029).

9947491 is a wasteful number, since it uses less digits than its factorization.

9947491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285.

The product of its digits is 81648, while the sum is 43.

The square root of 9947491 is about 3153.9643308065. The cubic root of 9947491 is about 215.0657163454.

The spelling of 9947491 in words is "nine million, nine hundred forty-seven thousand, four hundred ninety-one".