3978667067 has 2 divisors, whose sum is σ = 3978667068. Its totient is φ = 3978667066.

The previous prime is 3978667039. The next prime is 3978667073. The reversal of 3978667067 is 7607668793.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3978667067 - 2²⁴ = 3961889851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3978666997 and 3978667015.

It is not a weakly prime, because it can be changed into another prime (3978667027) 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, 1989333533 + 1989333534.

It is an arithmetic number, because the mean of its divisors is an integer number (1989333534).

Almost surely, 2^3978667067 is an apocalyptic number.

3978667067 is a deficient number, since it is larger than the sum of its proper divisors (1).

3978667067 is an equidigital number, since it uses as much as digits as its factorization.

3978667067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16003008, while the sum is 59.

The square root of 3978667067 is about 63076.6760934658. The cubic root of 3978667067 is about 1584.5740269108.

The spelling of 3978667067 in words is "three billion, nine hundred seventy-eight million, six hundred sixty-seven thousand, sixty-seven".