9742717121 has 2 divisors, whose sum is σ = 9742717122. Its totient is φ = 9742717120.

The previous prime is 9742717109. The next prime is 9742717129. The reversal of 9742717121 is 1217172479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5968335025 + 3774382096 = 77255^2 + 61436^2 .

It is an emirp because it is prime and its reverse (1217172479) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9742717121 - 2¹⁰ = 9742716097 is a prime.

It is not a weakly prime, because it can be changed into another prime (9742717129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4871358560 + 4871358561.

It is an arithmetic number, because the mean of its divisors is an integer number (4871358561).

Almost surely, 2^9742717121 is an apocalyptic number.

It is an amenable number.

9742717121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9742717121 is an equidigital number, since it uses as much as digits as its factorization.

9742717121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 41.

The square root of 9742717121 is about 98705.2031100691. The cubic root of 9742717121 is about 2135.7972894437.

The spelling of 9742717121 in words is "nine billion, seven hundred forty-two million, seven hundred seventeen thousand, one hundred twenty-one".