3966139 has 2 divisors, whose sum is σ = 3966140. Its totient is φ = 3966138.

The previous prime is 3966121. The next prime is 3966161. The reversal of 3966139 is 9316693.

It is a weak prime.

It is an emirp because it is prime and its reverse (9316693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3966139 - 2¹¹ = 3964091 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3966098 and 3966107.

It is not a weakly prime, because it can be changed into another prime (3966119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983069 + 1983070.

It is an arithmetic number, because the mean of its divisors is an integer number (1983070).

Almost surely, 2^3966139 is an apocalyptic number.

3966139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966139 is an equidigital number, since it uses as much as digits as its factorization.

3966139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26244, while the sum is 37.

The square root of 3966139 is about 1991.5167586541. The cubic root of 3966139 is about 158.2909103950.

The spelling of 3966139 in words is "three million, nine hundred sixty-six thousand, one hundred thirty-nine".