3981603 has 4 divisors (see below), whose sum is σ = 5308808. Its totient is φ = 2654400.

The previous prime is 3981589. The next prime is 3981617. The reversal of 3981603 is 3061893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3061893 = 3 ⋅1020631.

It is an interprime number because it is at equal distance from previous prime (3981589) and next prime (3981617).

It is not a de Polignac number, because 3981603 - 2⁶ = 3981539 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3981643) 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, 663598 + ... + 663603.

It is an arithmetic number, because the mean of its divisors is an integer number (1327202).

Almost surely, 2^3981603 is an apocalyptic number.

3981603 is a deficient number, since it is larger than the sum of its proper divisors (1327205).

3981603 is a wasteful number, since it uses less digits than its factorization.

3981603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327204.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 3981603 is about 1995.3954495287. The cubic root of 3981603 is about 158.4963693370.

The spelling of 3981603 in words is "three million, nine hundred eighty-one thousand, six hundred three".