2091903 has 8 divisors (see below), whose sum is σ = 3042816. Its totient is φ = 1267800.

The previous prime is 2091889. The next prime is 2091913. The reversal of 2091903 is 3091902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2091903 - 2⁵ = 2091871 is a prime.

It is a super-2 number, since 2×2091903² = 8752116322818, which contains 22 as substring.

2091903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091913) 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, 31663 + ... + 31728.

It is an arithmetic number, because the mean of its divisors is an integer number (380352).

2^2091903 is an apocalyptic number.

2091903 is a deficient number, since it is larger than the sum of its proper divisors (950913).

2091903 is a wasteful number, since it uses less digits than its factorization.

2091903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63405.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 2091903 is about 1446.3412460412. The cubic root of 2091903 is about 127.8931196010.

Subtracting 2091903 from its reverse (3091902), we obtain a palindrome (999999).

It can be divided in two parts, 209 and 1903, that added together give a palindrome (2112).

The spelling of 2091903 in words is "two million, ninety-one thousand, nine hundred three".