9785910961 has 2 divisors, whose sum is σ = 9785910962. Its totient is φ = 9785910960.

The previous prime is 9785910949. The next prime is 9785910977. The reversal of 9785910961 is 1690195879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5822453025 + 3963457936 = 76305^2 + 62956^2 .

It is a cyclic number.

It is not a de Polignac number, because 9785910961 - 2²³ = 9777522353 is a prime.

It is not a weakly prime, because it can be changed into another prime (9785910931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4892955480 + 4892955481.

It is an arithmetic number, because the mean of its divisors is an integer number (4892955481).

Almost surely, 2^9785910961 is an apocalyptic number.

It is an amenable number.

9785910961 is a deficient number, since it is larger than the sum of its proper divisors (1).

9785910961 is an equidigital number, since it uses as much as digits as its factorization.

9785910961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 55.

The square root of 9785910961 is about 98923.7633786746. The cubic root of 9785910961 is about 2138.9489526002.

The spelling of 9785910961 in words is "nine billion, seven hundred eighty-five million, nine hundred ten thousand, nine hundred sixty-one".