990252287 has 2 divisors, whose sum is σ = 990252288.
Its totient is φ = 990252286.
The previous prime is 990252271. The next prime is 990252293. The reversal of 990252287 is 782252099.
It is a strong prime.
It is an emirp because it is prime and its reverse (782252099) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 990252287 - 24 = 990252271 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (990251287) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495126143 + 495126144.
It is an arithmetic number, because the mean of its divisors is an integer number (495126144).
Almost surely, 2990252287 is an apocalyptic number.
990252287 is a deficient number, since it is larger than the sum of its proper divisors (1).
990252287 is an equidigital number, since it uses as much as digits as its factorization.
990252287 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 181440, while the sum is 44.
The square root of 990252287 is about 31468.2742933260.
The cubic root of 990252287 is about 996.7401472404.
The spelling of 990252287 in words is "nine hundred ninety million, two hundred fifty-two thousand, two hundred eighty-seven".