990810241 has 2 divisors, whose sum is σ = 990810242. Its totient is φ = 990810240.

The previous prime is 990810229. The next prime is 990810311. The reversal of 990810241 is 142018099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 984704400 + 6105841 = 31380^2 + 2471^2 .

It is a cyclic number.

It is not a de Polignac number, because 990810241 - 2²³ = 982421633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990810197 and 990810206.

It is not a weakly prime, because it can be changed into another prime (990810341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495405120 + 495405121.

It is an arithmetic number, because the mean of its divisors is an integer number (495405121).

Almost surely, 2^990810241 is an apocalyptic number.

It is an amenable number.

990810241 is a deficient number, since it is larger than the sum of its proper divisors (1).

990810241 is an equidigital number, since it uses as much as digits as its factorization.

990810241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 990810241 is about 31477.1383864544. The cubic root of 990810241 is about 996.9273152787.

The spelling of 990810241 in words is "nine hundred ninety million, eight hundred ten thousand, two hundred forty-one".