3903947 has 2 divisors, whose sum is σ = 3903948. Its totient is φ = 3903946.

The previous prime is 3903937. The next prime is 3903973. The reversal of 3903947 is 7493093.

It is a weak prime.

It is an emirp because it is prime and its reverse (7493093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3903947 - 2⁶ = 3903883 is a prime.

It is not a weakly prime, because it can be changed into another prime (3903917) 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, 1951973 + 1951974.

It is an arithmetic number, because the mean of its divisors is an integer number (1951974).

Almost surely, 2^3903947 is an apocalyptic number.

3903947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3903947 is an equidigital number, since it uses as much as digits as its factorization.

3903947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 3903947 is about 1975.8408336706. The cubic root of 3903947 is about 157.4591747719.

The spelling of 3903947 in words is "three million, nine hundred three thousand, nine hundred forty-seven".