9942457289 has 2 divisors, whose sum is σ = 9942457290. Its totient is φ = 9942457288.

The previous prime is 9942457247. The next prime is 9942457307. The reversal of 9942457289 is 9827542499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9449395264 + 493062025 = 97208^2 + 22205^2 .

It is a cyclic number.

It is not a de Polignac number, because 9942457289 - 2¹² = 9942453193 is a prime.

It is not a weakly prime, because it can be changed into another prime (9942453289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971228644 + 4971228645.

It is an arithmetic number, because the mean of its divisors is an integer number (4971228645).

Almost surely, 2^9942457289 is an apocalyptic number.

It is an amenable number.

9942457289 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942457289 is an equidigital number, since it uses as much as digits as its factorization.

9942457289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 59.

The square root of 9942457289 is about 99711.8713544180. The cubic root of 9942457289 is about 2150.2943378533.

The spelling of 9942457289 in words is "nine billion, nine hundred forty-two million, four hundred fifty-seven thousand, two hundred eighty-nine".