9996491 has 2 divisors, whose sum is σ = 9996492. Its totient is φ = 9996490.

The previous prime is 9996487. The next prime is 9996509. The reversal of 9996491 is 1946999.

It is a weak prime.

It is an emirp because it is prime and its reverse (1946999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9996491 - 2² = 9996487 is a prime.

It is not a weakly prime, because it can be changed into another prime (9996461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998245 + 4998246.

It is an arithmetic number, because the mean of its divisors is an integer number (4998246).

Almost surely, 2^9996491 is an apocalyptic number.

9996491 is a deficient number, since it is larger than the sum of its proper divisors (1).

9996491 is an equidigital number, since it uses as much as digits as its factorization.

9996491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 157464, while the sum is 47.

The square root of 9996491 is about 3161.7227898726. The cubic root of 9996491 is about 215.4182663507.

The spelling of 9996491 in words is "nine million, nine hundred ninety-six thousand, four hundred ninety-one".