990263647 has 2 divisors, whose sum is σ = 990263648. Its totient is φ = 990263646.

The previous prime is 990263629. The next prime is 990263711. The reversal of 990263647 is 746362099.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990263647 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 990263597 and 990263606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990263047) 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, 495131823 + 495131824.

It is an arithmetic number, because the mean of its divisors is an integer number (495131824).

Almost surely, 2^990263647 is an apocalyptic number.

990263647 is a deficient number, since it is larger than the sum of its proper divisors (1).

990263647 is an equidigital number, since it uses as much as digits as its factorization.

990263647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 990263647 is about 31468.4547920612. The cubic root of 990263647 is about 996.7439587017.

The spelling of 990263647 in words is "nine hundred ninety million, two hundred sixty-three thousand, six hundred forty-seven".