3987478667 has 2 divisors, whose sum is σ = 3987478668. Its totient is φ = 3987478666.

The previous prime is 3987478631. The next prime is 3987478699. The reversal of 3987478667 is 7668747893.

3987478667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3987478667 - 2⁶ = 3987478603 is a prime.

It is a super-2 number, since 2×3987478667² = 31799972239560193778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3987478067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993739333 + 1993739334.

It is an arithmetic number, because the mean of its divisors is an integer number (1993739334).

Almost surely, 2^3987478667 is an apocalyptic number.

3987478667 is a deficient number, since it is larger than the sum of its proper divisors (1).

3987478667 is an equidigital number, since it uses as much as digits as its factorization.

3987478667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85349376, while the sum is 65.

The square root of 3987478667 is about 63146.4857850380. The cubic root of 3987478667 is about 1585.7429558670.

The spelling of 3987478667 in words is "three billion, nine hundred eighty-seven million, four hundred seventy-eight thousand, six hundred sixty-seven".