990250427 has 2 divisors, whose sum is σ = 990250428. Its totient is φ = 990250426.

The previous prime is 990250423. The next prime is 990250447. The reversal of 990250427 is 724052099.

990250427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (724052099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990250427 - 2² = 990250423 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (990250423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495125213 + 495125214.

It is an arithmetic number, because the mean of its divisors is an integer number (495125214).

Almost surely, 2^990250427 is an apocalyptic number.

990250427 is a deficient number, since it is larger than the sum of its proper divisors (1).

990250427 is an equidigital number, since it uses as much as digits as its factorization.

990250427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 990250427 is about 31468.2447397372. The cubic root of 990250427 is about 996.7395231780.

The spelling of 990250427 in words is "nine hundred ninety million, two hundred fifty thousand, four hundred twenty-seven".