491129103 has 4 divisors (see below), whose sum is σ = 654838808. Its totient is φ = 327419400.

The previous prime is 491129071. The next prime is 491129113. The reversal of 491129103 is 301921194.

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

It is not a de Polignac number, because 491129103 - 2⁵ = 491129071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491129113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81854848 + ... + 81854853.

It is an arithmetic number, because the mean of its divisors is an integer number (163709702).

Almost surely, 2^491129103 is an apocalyptic number.

491129103 is a deficient number, since it is larger than the sum of its proper divisors (163709705).

491129103 is a wasteful number, since it uses less digits than its factorization.

491129103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163709704.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 491129103 is about 22161.4327831032. The cubic root of 491129103 is about 788.9785993383.

The spelling of 491129103 in words is "four hundred ninety-one million, one hundred twenty-nine thousand, one hundred three".