9867491 has 2 divisors, whose sum is σ = 9867492. Its totient is φ = 9867490.

The previous prime is 9867469. The next prime is 9867521. The reversal of 9867491 is 1947689.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9867491 - 2⁶ = 9867427 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9267491) 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 as a sum of consecutive naturals, namely, 4933745 + 4933746.

It is an arithmetic number, because the mean of its divisors is an integer number (4933746).

Almost surely, 2^9867491 is an apocalyptic number.

9867491 is a deficient number, since it is larger than the sum of its proper divisors (1).

9867491 is an equidigital number, since it uses as much as digits as its factorization.

9867491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 9867491 is about 3141.2562773515. The cubic root of 9867491 is about 214.4876279489.

The spelling of 9867491 in words is "nine million, eight hundred sixty-seven thousand, four hundred ninety-one".