3968218249 has 2 divisors, whose sum is σ = 3968218250. Its totient is φ = 3968218248.

The previous prime is 3968218231. The next prime is 3968218253. The reversal of 3968218249 is 9428128693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3903125625 + 65092624 = 62475^2 + 8068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3968218249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3968218196 and 3968218205.

It is not a weakly prime, because it can be changed into another prime (3968218349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1984109124 + 1984109125.

It is an arithmetic number, because the mean of its divisors is an integer number (1984109125).

Almost surely, 2^3968218249 is an apocalyptic number.

It is an amenable number.

3968218249 is a deficient number, since it is larger than the sum of its proper divisors (1).

3968218249 is an equidigital number, since it uses as much as digits as its factorization.

3968218249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 52.

The square root of 3968218249 is about 62993.7953214442. The cubic root of 3968218249 is about 1583.1856690754.

The spelling of 3968218249 in words is "three billion, nine hundred sixty-eight million, two hundred eighteen thousand, two hundred forty-nine".