3818947 has 4 divisors (see below), whose sum is σ = 4166136. Its totient is φ = 3471760.

The previous prime is 3818929. The next prime is 3818951. The reversal of 3818947 is 7498183.

3818947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3818947 - 2¹⁹ = 3294659 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

3818947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3818917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173578 + ... + 173599.

It is an arithmetic number, because the mean of its divisors is an integer number (1041534).

Almost surely, 2^3818947 is an apocalyptic number.

3818947 is a deficient number, since it is larger than the sum of its proper divisors (347189).

3818947 is a wasteful number, since it uses less digits than its factorization.

3818947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347188.

The product of its digits is 48384, while the sum is 40.

The square root of 3818947 is about 1954.2126291681. The cubic root of 3818947 is about 156.3080015066.

The spelling of 3818947 in words is "three million, eight hundred eighteen thousand, nine hundred forty-seven".