9649954961 has 2 divisors, whose sum is σ = 9649954962. Its totient is φ = 9649954960.

The previous prime is 9649954921. The next prime is 9649954969. The reversal of 9649954961 is 1694599469.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7980742225 + 1669212736 = 89335^2 + 40856^2 .

It is a cyclic number.

It is not a de Polignac number, because 9649954961 - 2¹⁸ = 9649692817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9649954894 and 9649954903.

It is not a weakly prime, because it can be changed into another prime (9649954969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4824977480 + 4824977481.

It is an arithmetic number, because the mean of its divisors is an integer number (4824977481).

Almost surely, 2^9649954961 is an apocalyptic number.

It is an amenable number.

9649954961 is a deficient number, since it is larger than the sum of its proper divisors (1).

9649954961 is an equidigital number, since it uses as much as digits as its factorization.

9649954961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18895680, while the sum is 62.

The square root of 9649954961 is about 98234.1842792009. The cubic root of 9649954961 is about 2128.9972254550.

The spelling of 9649954961 in words is "nine billion, six hundred forty-nine million, nine hundred fifty-four thousand, nine hundred sixty-one".