7427939 has 2 divisors, whose sum is σ = 7427940. Its totient is φ = 7427938.

The previous prime is 7427933. The next prime is 7427947. The reversal of 7427939 is 9397247.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7427939 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 7 + 4¹⁰ + 2¹¹ + 7 + 9 + 3¹³ + 9⁷ .

It is a junction number, because it is equal to n+sod(n) for n = 7427896 and 7427905.

It is not a weakly prime, because it can be changed into another prime (7427933) 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, 3713969 + 3713970.

It is an arithmetic number, because the mean of its divisors is an integer number (3713970).

Almost surely, 2^7427939 is an apocalyptic number.

7427939 is a deficient number, since it is larger than the sum of its proper divisors (1).

7427939 is an equidigital number, since it uses as much as digits as its factorization.

7427939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 41.

The square root of 7427939 is about 2725.4245540833. The cubic root of 7427939 is about 195.1144539572.

The spelling of 7427939 in words is "seven million, four hundred twenty-seven thousand, nine hundred thirty-nine".