3942847 has 4 divisors (see below), whose sum is σ = 4039056. Its totient is φ = 3846640.

The previous prime is 3942839. The next prime is 3942871. The reversal of 3942847 is 7482493.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3942847 - 2³ = 3942839 is a prime.

It is a Duffinian number.

3942847 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3942047) 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, 48043 + ... + 48124.

It is an arithmetic number, because the mean of its divisors is an integer number (1009764).

Almost surely, 2^3942847 is an apocalyptic number.

3942847 is a deficient number, since it is larger than the sum of its proper divisors (96209).

3942847 is an equidigital number, since it uses as much as digits as its factorization.

3942847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96208.

The product of its digits is 48384, while the sum is 37.

The square root of 3942847 is about 1985.6603435633. The cubic root of 3942847 is about 157.9804360758.

The spelling of 3942847 in words is "three million, nine hundred forty-two thousand, eight hundred forty-seven".