9763971221 has 2 divisors, whose sum is σ = 9763971222. Its totient is φ = 9763971220.

The previous prime is 9763971193. The next prime is 9763971229. The reversal of 9763971221 is 1221793679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9724720996 + 39250225 = 98614^2 + 6265^2 .

It is a cyclic number.

It is not a de Polignac number, because 9763971221 - 2⁶ = 9763971157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9763971229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4881985610 + 4881985611.

It is an arithmetic number, because the mean of its divisors is an integer number (4881985611).

Almost surely, 2^9763971221 is an apocalyptic number.

It is an amenable number.

9763971221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9763971221 is an equidigital number, since it uses as much as digits as its factorization.

9763971221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 9763971221 is about 98812.8089925593. The cubic root of 9763971221 is about 2137.3492685156.

The spelling of 9763971221 in words is "nine billion, seven hundred sixty-three million, nine hundred seventy-one thousand, two hundred twenty-one".