7990847 has 2 divisors, whose sum is σ = 7990848. Its totient is φ = 7990846.

The previous prime is 7990823. The next prime is 7990877. The reversal of 7990847 is 7480997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7990847 - 2¹² = 7986751 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7990798 and 7990807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7990877) 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, 3995423 + 3995424.

It is an arithmetic number, because the mean of its divisors is an integer number (3995424).

Almost surely, 2^7990847 is an apocalyptic number.

7990847 is a deficient number, since it is larger than the sum of its proper divisors (1).

7990847 is an equidigital number, since it uses as much as digits as its factorization.

7990847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 7990847 is about 2826.8086245800. The cubic root of 7990847 is about 199.9236958921.

The spelling of 7990847 in words is "seven million, nine hundred ninety thousand, eight hundred forty-seven".