3949903 has 2 divisors, whose sum is σ = 3949904. Its totient is φ = 3949902.

The previous prime is 3949889. The next prime is 3949919. The reversal of 3949903 is 3099493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3949903 - 2⁵ = 3949871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3949003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974951 + 1974952.

It is an arithmetic number, because the mean of its divisors is an integer number (1974952).

Almost surely, 2^3949903 is an apocalyptic number.

3949903 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949903 is an equidigital number, since it uses as much as digits as its factorization.

3949903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 3949903 is about 1987.4362882870. The cubic root of 3949903 is about 158.0746189227.

The spelling of 3949903 in words is "three million, nine hundred forty-nine thousand, nine hundred three".