3920347 has 4 divisors (see below), whose sum is σ = 3936856. Its totient is φ = 3903840.

The previous prime is 3920311. The next prime is 3920359. The reversal of 3920347 is 7430293.

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 3920347 - 2¹⁹ = 3396059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3920377) 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, 7893 + ... + 8374.

It is an arithmetic number, because the mean of its divisors is an integer number (984214).

Almost surely, 2^3920347 is an apocalyptic number.

3920347 is a deficient number, since it is larger than the sum of its proper divisors (16509).

3920347 is a wasteful number, since it uses less digits than its factorization.

3920347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16508.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 3920347 is about 1979.9866161164. The cubic root of 3920347 is about 157.6793556012.

The spelling of 3920347 in words is "three million, nine hundred twenty thousand, three hundred forty-seven".