990325289 has 2 divisors, whose sum is σ = 990325290. Its totient is φ = 990325288.

The previous prime is 990325261. The next prime is 990325351. The reversal of 990325289 is 982523099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 841290025 + 149035264 = 29005^2 + 12208^2 .

It is an emirp because it is prime and its reverse (982523099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990325289 - 2⁸ = 990325033 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (990325229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495162644 + 495162645.

It is an arithmetic number, because the mean of its divisors is an integer number (495162645).

Almost surely, 2^990325289 is an apocalyptic number.

It is an amenable number.

990325289 is a deficient number, since it is larger than the sum of its proper divisors (1).

990325289 is an equidigital number, since it uses as much as digits as its factorization.

990325289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 990325289 is about 31469.4342020952. The cubic root of 990325289 is about 996.7646400682.

The spelling of 990325289 in words is "nine hundred ninety million, three hundred twenty-five thousand, two hundred eighty-nine".