990000647 has 2 divisors, whose sum is σ = 990000648. Its totient is φ = 990000646.

The previous prime is 990000629. The next prime is 990000679. The reversal of 990000647 is 746000099.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990000647 - 2¹⁴ = 989984263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990000617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495000323 + 495000324.

It is an arithmetic number, because the mean of its divisors is an integer number (495000324).

Almost surely, 2^990000647 is an apocalyptic number.

990000647 is a deficient number, since it is larger than the sum of its proper divisors (1).

990000647 is an equidigital number, since it uses as much as digits as its factorization.

990000647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 990000647 is about 31464.2757266078. The cubic root of 990000647 is about 996.6557105291.

The spelling of 990000647 in words is "nine hundred ninety million, six hundred forty-seven", and thus it is an aban number.