3978667049 has 16 divisors (see below), whose sum is σ = 4589654016. Its totient is φ = 3378412800.

The previous prime is 3978667039. The next prime is 3978667067. The reversal of 3978667049 is 9407668793.

It is not a de Polignac number, because 3978667049 - 2¹² = 3978662953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3978667039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673589 + ... + 679469.

It is an arithmetic number, because the mean of its divisors is an integer number (286853376).

Almost surely, 2^3978667049 is an apocalyptic number.

It is an amenable number.

3978667049 is a deficient number, since it is larger than the sum of its proper divisors (610986967).

3978667049 is a wasteful number, since it uses less digits than its factorization.

3978667049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776.

The product of its (nonzero) digits is 13716864, while the sum is 59.

The square root of 3978667049 is about 63076.6759507823. The cubic root of 3978667049 is about 1584.5740245212.

The spelling of 3978667049 in words is "three billion, nine hundred seventy-eight million, six hundred sixty-seven thousand, forty-nine".