7898939 has 2 divisors, whose sum is σ = 7898940. Its totient is φ = 7898938.

The previous prime is 7898929. The next prime is 7898981. The reversal of 7898939 is 9398987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7898939 - 2⁴ = 7898923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7898909) 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, 3949469 + 3949470.

It is an arithmetic number, because the mean of its divisors is an integer number (3949470).

Almost surely, 2^7898939 is an apocalyptic number.

7898939 is a deficient number, since it is larger than the sum of its proper divisors (1).

7898939 is an equidigital number, since it uses as much as digits as its factorization.

7898939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 7898939 is about 2810.5051147436. The cubic root of 7898939 is about 199.1542536065.

The spelling of 7898939 in words is "seven million, eight hundred ninety-eight thousand, nine hundred thirty-nine".