7421943313 has 2 divisors, whose sum is σ = 7421943314. Its totient is φ = 7421943312.

The previous prime is 7421943293. The next prime is 7421943329. The reversal of 7421943313 is 3133491247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4768869249 + 2653074064 = 69057^2 + 51508^2 .

It is an emirp because it is prime and its reverse (3133491247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7421943313 - 2¹³ = 7421935121 is a prime.

It is not a weakly prime, because it can be changed into another prime (7421943013) 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, 3710971656 + 3710971657.

It is an arithmetic number, because the mean of its divisors is an integer number (3710971657).

Almost surely, 2^7421943313 is an apocalyptic number.

It is an amenable number.

7421943313 is a deficient number, since it is larger than the sum of its proper divisors (1).

7421943313 is an equidigital number, since it uses as much as digits as its factorization.

7421943313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 7421943313 is about 86150.7011753242. The cubic root of 7421943313 is about 1950.6194230292.

The spelling of 7421943313 in words is "seven billion, four hundred twenty-one million, nine hundred forty-three thousand, three hundred thirteen".