3964139 has 4 divisors (see below), whose sum is σ = 3973200. Its totient is φ = 3955080.

The previous prime is 3964133. The next prime is 3964157. The reversal of 3964139 is 9314693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9314693 = 19 ⋅490247.

It is a cyclic number.

It is not a de Polignac number, because 3964139 - 2⁴ = 3964123 is a prime.

It is a super-2 number, since 2×3964139² = 31428796022642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3964099 and 3964108.

It is not an unprimeable number, because it can be changed into a prime (3964133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3839 + ... + 4760.

It is an arithmetic number, because the mean of its divisors is an integer number (993300).

Almost surely, 2^3964139 is an apocalyptic number.

3964139 is a deficient number, since it is larger than the sum of its proper divisors (9061).

3964139 is an equidigital number, since it uses as much as digits as its factorization.

3964139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9060.

The product of its digits is 17496, while the sum is 35.

The square root of 3964139 is about 1991.0145654917. The cubic root of 3964139 is about 158.2642988676.

The spelling of 3964139 in words is "three million, nine hundred sixty-four thousand, one hundred thirty-nine".