4003947 has 6 divisors (see below), whose sum is σ = 5783492. Its totient is φ = 2669292.

The previous prime is 4003939. The next prime is 4003949. The reversal of 4003947 is 7493004.

It is not a de Polignac number, because 4003947 - 2³ = 4003939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4003947.

It is not an unprimeable number, because it can be changed into a prime (4003949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222433 + ... + 222450.

Almost surely, 2^4003947 is an apocalyptic number.

4003947 is a deficient number, since it is larger than the sum of its proper divisors (1779545).

4003947 is a wasteful number, since it uses less digits than its factorization.

4003947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444889 (or 444886 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 4003947 is about 2000.9865067011. The cubic root of 4003947 is about 158.7923002990.

It can be divided in two parts, 4003 and 947, that added together give a triangular number (4950 = T₉₉).

The spelling of 4003947 in words is "four million, three thousand, nine hundred forty-seven".