3971403 has 8 divisors (see below), whose sum is σ = 5883600. Its totient is φ = 2647584.

The previous prime is 3971393. The next prime is 3971411. The reversal of 3971403 is 3041793.

It is not a de Polignac number, because 3971403 - 2⁸ = 3971147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 147089 = 3971403 / (3 + 9 + 7 + 1 + 4 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (3971413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73518 + ... + 73571.

It is an arithmetic number, because the mean of its divisors is an integer number (735450).

Almost surely, 2^3971403 is an apocalyptic number.

3971403 is a deficient number, since it is larger than the sum of its proper divisors (1912197).

3971403 is a wasteful number, since it uses less digits than its factorization.

3971403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147098 (or 147092 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 3971403 is about 1992.8379261746. The cubic root of 3971403 is about 158.3609092013.

The spelling of 3971403 in words is "three million, nine hundred seventy-one thousand, four hundred three".