491217103 has 8 divisors (see below), whose sum is σ = 546068096. Its totient is φ = 438804000.

The previous prime is 491217101. The next prime is 491217113. The reversal of 491217103 is 301712194.

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

It is a cyclic number.

It is not a de Polignac number, because 491217103 - 2¹ = 491217101 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 (491217101) 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, 609048 + ... + 609853.

It is an arithmetic number, because the mean of its divisors is an integer number (68258512).

Almost surely, 2^491217103 is an apocalyptic number.

491217103 is a deficient number, since it is larger than the sum of its proper divisors (54850993).

491217103 is a wasteful number, since it uses less digits than its factorization.

491217103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218945.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 491217103 is about 22163.4181253705. The cubic root of 491217103 is about 789.0257193113.

Adding to 491217103 its reverse (301712194), we get a palindrome (792929297).

The spelling of 491217103 in words is "four hundred ninety-one million, two hundred seventeen thousand, one hundred three".