990425539 has 2 divisors, whose sum is σ = 990425540. Its totient is φ = 990425538.

The previous prime is 990425537. The next prime is 990425549. The reversal of 990425539 is 935524099.

It is a weak prime.

It is an emirp because it is prime and its reverse (935524099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990425539 - 2¹ = 990425537 is a prime.

Together with 990425537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (990425533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495212769 + 495212770.

It is an arithmetic number, because the mean of its divisors is an integer number (495212770).

Almost surely, 2^990425539 is an apocalyptic number.

990425539 is a deficient number, since it is larger than the sum of its proper divisors (1).

990425539 is an equidigital number, since it uses as much as digits as its factorization.

990425539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 46.

The square root of 990425539 is about 31471.0269772056. The cubic root of 990425539 is about 996.7982728838.

The spelling of 990425539 in words is "nine hundred ninety million, four hundred twenty-five thousand, five hundred thirty-nine".