9702221057 has 2 divisors, whose sum is σ = 9702221058. Its totient is φ = 9702221056.

The previous prime is 9702221033. The next prime is 9702221059. The reversal of 9702221057 is 7501222079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8692951696 + 1009269361 = 93236^2 + 31769^2 .

It is a cyclic number.

It is not a de Polignac number, because 9702221057 - 2¹⁶ = 9702155521 is a prime.

Together with 9702221059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9702221059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4851110528 + 4851110529.

It is an arithmetic number, because the mean of its divisors is an integer number (4851110529).

Almost surely, 2^9702221057 is an apocalyptic number.

It is an amenable number.

9702221057 is a deficient number, since it is larger than the sum of its proper divisors (1).

9702221057 is an equidigital number, since it uses as much as digits as its factorization.

9702221057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 9702221057 is about 98499.8530811087. The cubic root of 9702221057 is about 2132.8339991790.

The spelling of 9702221057 in words is "nine billion, seven hundred two million, two hundred twenty-one thousand, fifty-seven".