4009903 has 4 divisors (see below), whose sum is σ = 4015440. Its totient is φ = 4004368.

The previous prime is 4009897. The next prime is 4009913. The reversal of 4009903 is 3099004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4009903 - 2⁹ = 4009391 is a prime.

It is a Duffinian number.

4009903 is a lucky number.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4009913) 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, 1483 + ... + 3196.

It is an arithmetic number, because the mean of its divisors is an integer number (1003860).

Almost surely, 2^4009903 is an apocalyptic number.

4009903 is a deficient number, since it is larger than the sum of its proper divisors (5537).

4009903 is an equidigital number, since it uses as much as digits as its factorization.

4009903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 4009903 is about 2002.4742195594. The cubic root of 4009903 is about 158.8709975091.

The spelling of 4009903 in words is "four million, nine thousand, nine hundred three".