9661787 has 2 divisors, whose sum is σ = 9661788. Its totient is φ = 9661786.

The previous prime is 9661783. The next prime is 9661829. The reversal of 9661787 is 7871669.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9661787 - 2² = 9661783 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9661783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830893 + 4830894.

It is an arithmetic number, because the mean of its divisors is an integer number (4830894).

Almost surely, 2^9661787 is an apocalyptic number.

9661787 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661787 is an equidigital number, since it uses as much as digits as its factorization.

9661787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 9661787 is about 3108.3415192028. The cubic root of 9661787 is about 212.9867008088.

The spelling of 9661787 in words is "nine million, six hundred sixty-one thousand, seven hundred eighty-seven".