7997387 has 2 divisors, whose sum is σ = 7997388. Its totient is φ = 7997386.

The previous prime is 7997377. The next prime is 7997389. The reversal of 7997387 is 7837997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7997387 - 2⁶ = 7997323 is a prime.

Together with 7997389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7997389) 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, 3998693 + 3998694.

It is an arithmetic number, because the mean of its divisors is an integer number (3998694).

Almost surely, 2^7997387 is an apocalyptic number.

7997387 is a deficient number, since it is larger than the sum of its proper divisors (1).

7997387 is an equidigital number, since it uses as much as digits as its factorization.

7997387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 50.

The square root of 7997387 is about 2827.9651695168. The cubic root of 7997387 is about 199.9782226288.

The spelling of 7997387 in words is "seven million, nine hundred ninety-seven thousand, three hundred eighty-seven".