9990767 has 2 divisors, whose sum is σ = 9990768. Its totient is φ = 9990766.

The previous prime is 9990737. The next prime is 9990769. The reversal of 9990767 is 7670999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9990767 - 2¹⁴ = 9974383 is a prime.

Together with 9990769, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9990769) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995383 + 4995384.

It is an arithmetic number, because the mean of its divisors is an integer number (4995384).

Almost surely, 2^9990767 is an apocalyptic number.

9990767 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990767 is an equidigital number, since it uses as much as digits as its factorization.

9990767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 9990767 is about 3160.8174575575. The cubic root of 9990767 is about 215.3771422675.

The spelling of 9990767 in words is "nine million, nine hundred ninety thousand, seven hundred sixty-seven".