7938481 has 2 divisors, whose sum is σ = 7938482. Its totient is φ = 7938480.

The previous prime is 7938457. The next prime is 7938503. The reversal of 7938481 is 1848397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4389025 + 3549456 = 2095^2 + 1884^2 .

It is an emirp because it is prime and its reverse (1848397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7938481 - 2¹³ = 7930289 is a prime.

It is a super-2 number, since 2×7938481² = 126038961174722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7933481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3969240 + 3969241.

It is an arithmetic number, because the mean of its divisors is an integer number (3969241).

Almost surely, 2^7938481 is an apocalyptic number.

It is an amenable number.

7938481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7938481 is an equidigital number, since it uses as much as digits as its factorization.

7938481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 7938481 is about 2817.5310113644. The cubic root of 7938481 is about 199.4860219309.

The spelling of 7938481 in words is "seven million, nine hundred thirty-eight thousand, four hundred eighty-one".