7881390343 has 2 divisors, whose sum is σ = 7881390344. Its totient is φ = 7881390342.

The previous prime is 7881390331. The next prime is 7881390367. The reversal of 7881390343 is 3430931887.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7881390343 is a prime.

It is a super-3 number, since 3×7881390343³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7881390293 and 7881390302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7881390443) 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, 3940695171 + 3940695172.

It is an arithmetic number, because the mean of its divisors is an integer number (3940695172).

Almost surely, 2^7881390343 is an apocalyptic number.

7881390343 is a deficient number, since it is larger than the sum of its proper divisors (1).

7881390343 is an equidigital number, since it uses as much as digits as its factorization.

7881390343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 7881390343 is about 88777.1949489282. The cubic root of 7881390343 is about 1990.0666074521.

The spelling of 7881390343 in words is "seven billion, eight hundred eighty-one million, three hundred ninety thousand, three hundred forty-three".