3847939 has 2 divisors, whose sum is σ = 3847940. Its totient is φ = 3847938.

The previous prime is 3847931. The next prime is 3848017. The reversal of 3847939 is 9397483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3847939 - 2³ = 3847931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3847895 and 3847904.

It is not a weakly prime, because it can be changed into another prime (3847931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1923969 + 1923970.

It is an arithmetic number, because the mean of its divisors is an integer number (1923970).

Almost surely, 2^3847939 is an apocalyptic number.

3847939 is a deficient number, since it is larger than the sum of its proper divisors (1).

3847939 is an equidigital number, since it uses as much as digits as its factorization.

3847939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 3847939 is about 1961.6164252983. The cubic root of 3847939 is about 156.7025484937.

The spelling of 3847939 in words is "three million, eight hundred forty-seven thousand, nine hundred thirty-nine".