3968218231 has 2 divisors, whose sum is σ = 3968218232. Its totient is φ = 3968218230.

The previous prime is 3968218223. The next prime is 3968218249. The reversal of 3968218231 is 1328128693.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3968218231 - 2³ = 3968218223 is a prime.

It is a super-2 number, since 2×3968218231² = 31493511857681538722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3968218031) 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, 1984109115 + 1984109116.

It is an arithmetic number, because the mean of its divisors is an integer number (1984109116).

Almost surely, 2^3968218231 is an apocalyptic number.

3968218231 is a deficient number, since it is larger than the sum of its proper divisors (1).

3968218231 is an equidigital number, since it uses as much as digits as its factorization.

3968218231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 3968218231 is about 62993.7951785729. The cubic root of 3968218231 is about 1583.1856666816.

The spelling of 3968218231 in words is "three billion, nine hundred sixty-eight million, two hundred eighteen thousand, two hundred thirty-one".