3903903 has 8 divisors (see below), whose sum is σ = 5783600. Its totient is φ = 2602584.

The previous prime is 3903901. The next prime is 3903917. The reversal of 3903903 is 3093093.

It is not a de Polignac number, because 3903903 - 2¹ = 3903901 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: 144589 = 3903903 / (3 + 9 + 0 + 3 + 9 + 0 + 3).

It is a Duffinian number.

3903903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3903901) 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, 72268 + ... + 72321.

It is an arithmetic number, because the mean of its divisors is an integer number (722950).

Almost surely, 2^3903903 is an apocalyptic number.

3903903 is a deficient number, since it is larger than the sum of its proper divisors (1879697).

3903903 is a wasteful number, since it uses less digits than its factorization.

3903903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144598 (or 144592 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 27.

The square root of 3903903 is about 1975.8296991391. The cubic root of 3903903 is about 157.4585832142.

Adding to 3903903 its reverse (3093093), we get a palindrome (6996996).

The spelling of 3903903 in words is "three million, nine hundred three thousand, nine hundred three".