3820939 has 4 divisors (see below), whose sum is σ = 3826656. Its totient is φ = 3815224.

The previous prime is 3820933. The next prime is 3820963. The reversal of 3820939 is 9390283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9390283 = 7 ⋅1341469.

It is a cyclic number.

It is not a de Polignac number, because 3820939 - 2⁷ = 3820811 is a prime.

It is a Duffinian number.

3820939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3820933) 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, 1699 + ... + 3244.

It is an arithmetic number, because the mean of its divisors is an integer number (956664).

Almost surely, 2^3820939 is an apocalyptic number.

3820939 is a deficient number, since it is larger than the sum of its proper divisors (5717).

3820939 is an equidigital number, since it uses as much as digits as its factorization.

3820939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5716.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 3820939 is about 1954.7222309065. The cubic root of 3820939 is about 156.3351740420.

The spelling of 3820939 in words is "three million, eight hundred twenty thousand, nine hundred thirty-nine".