9640811 has 2 divisors, whose sum is σ = 9640812. Its totient is φ = 9640810.

The previous prime is 9640739. The next prime is 9640817. The reversal of 9640811 is 1180469.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9640811 - 2¹⁸ = 9378667 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is equal to p₆₄₂₃₆₈ and since 9640811 and 642368 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (9640817) 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 as a sum of consecutive naturals, namely, 4820405 + 4820406.

It is an arithmetic number, because the mean of its divisors is an integer number (4820406).

Almost surely, 2^9640811 is an apocalyptic number.

9640811 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640811 is an equidigital number, since it uses as much as digits as its factorization.

9640811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 9640811 is about 3104.9655392613. The cubic root of 9640811 is about 212.8324558421.

The spelling of 9640811 in words is "nine million, six hundred forty thousand, eight hundred eleven".