491930103 has 64 divisors (see below), whose sum is σ = 813957120. Its totient is φ = 258249600.

The previous prime is 491930099. The next prime is 491930113. The reversal of 491930103 is 301039194.

It is not a de Polignac number, because 491930103 - 2² = 491930099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491930113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1340226 + ... + 1340592.

It is an arithmetic number, because the mean of its divisors is an integer number (12718080).

Almost surely, 2^491930103 is an apocalyptic number.

491930103 is a deficient number, since it is larger than the sum of its proper divisors (322027017).

491930103 is a wasteful number, since it uses less digits than its factorization.

491930103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 491930103 is about 22179.4973567933. The cubic root of 491930103 is about 789.4072908280.

Adding to 491930103 its reverse (301039194), we get a palindrome (792969297).

The spelling of 491930103 in words is "four hundred ninety-one million, nine hundred thirty thousand, one hundred three".