3920947 has 2 divisors, whose sum is σ = 3920948. Its totient is φ = 3920946.

The previous prime is 3920941. The next prime is 3920957. The reversal of 3920947 is 7490293.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3920947 - 2¹¹ = 3918899 is a prime.

3920947 is a lucky number.

It is equal to p₂₇₇₉₈₁ and since 3920947 and 277981 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3920941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960473 + 1960474.

It is an arithmetic number, because the mean of its divisors is an integer number (1960474).

Almost surely, 2^3920947 is an apocalyptic number.

3920947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3920947 is an equidigital number, since it uses as much as digits as its factorization.

3920947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 3920947 is about 1980.1381264952. The cubic root of 3920947 is about 157.6873993439.

The spelling of 3920947 in words is "three million, nine hundred twenty thousand, nine hundred forty-seven".