3986406139 has 4 divisors (see below), whose sum is σ = 3987071424. Its totient is φ = 3985740856.

The previous prime is 3986406121. The next prime is 3986406163. The reversal of 3986406139 is 9316046893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9316046893 = 9277 ⋅1004209.

It is a cyclic number.

It is not a de Polignac number, because 3986406139 - 2²³ = 3978017531 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3986406092 and 3986406101.

It is not an unprimeable number, because it can be changed into a prime (3986406239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323572 + ... + 335665.

It is an arithmetic number, because the mean of its divisors is an integer number (996767856).

Almost surely, 2^3986406139 is an apocalyptic number.

3986406139 is a deficient number, since it is larger than the sum of its proper divisors (665285).

3986406139 is an equidigital number, since it uses as much as digits as its factorization.

3986406139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665284.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 3986406139 is about 63137.9928331587. The cubic root of 3986406139 is about 1585.6007685876.

The spelling of 3986406139 in words is "three billion, nine hundred eighty-six million, four hundred six thousand, one hundred thirty-nine".