9953948261 has 2 divisors, whose sum is σ = 9953948262. Its totient is φ = 9953948260.

The previous prime is 9953948227. The next prime is 9953948281. The reversal of 9953948261 is 1628493599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6204712900 + 3749235361 = 78770^2 + 61231^2 .

It is a cyclic number.

It is not a de Polignac number, because 9953948261 - 2¹⁴ = 9953931877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9953948197 and 9953948206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9953948201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4976974130 + 4976974131.

It is an arithmetic number, because the mean of its divisors is an integer number (4976974131).

Almost surely, 2^9953948261 is an apocalyptic number.

It is an amenable number.

9953948261 is a deficient number, since it is larger than the sum of its proper divisors (1).

9953948261 is an equidigital number, since it uses as much as digits as its factorization.

9953948261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 56.

The square root of 9953948261 is about 99769.4755974993. The cubic root of 9953948261 is about 2151.1224181526.

The spelling of 9953948261 in words is "nine billion, nine hundred fifty-three million, nine hundred forty-eight thousand, two hundred sixty-one".