990788587 has 2 divisors, whose sum is σ = 990788588. Its totient is φ = 990788586.

The previous prime is 990788569. The next prime is 990788597. The reversal of 990788587 is 785887099.

It is a strong prime.

It is an emirp because it is prime and its reverse (785887099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990788587 - 2¹¹ = 990786539 is a prime.

It is not a weakly prime, because it can be changed into another prime (990788507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495394293 + 495394294.

It is an arithmetic number, because the mean of its divisors is an integer number (495394294).

Almost surely, 2^990788587 is an apocalyptic number.

990788587 is a deficient number, since it is larger than the sum of its proper divisors (1).

990788587 is an equidigital number, since it uses as much as digits as its factorization.

990788587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 61.

The square root of 990788587 is about 31476.7944206522. The cubic root of 990788587 is about 996.9200526633.

The spelling of 990788587 in words is "nine hundred ninety million, seven hundred eighty-eight thousand, five hundred eighty-seven".