491628503 has 8 divisors (see below), whose sum is σ = 520410000. Its totient is φ = 463635648.

The previous prime is 491628493. The next prime is 491628517. The reversal of 491628503 is 305826194.

It is a happy number.

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 491628503 - 2¹⁴ = 491612119 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 (491628563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195878 + ... + 198371.

It is an arithmetic number, because the mean of its divisors is an integer number (65051250).

Almost surely, 2^491628503 is an apocalyptic number.

491628503 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

491628503 is a deficient number, since it is larger than the sum of its proper divisors (28781497).

491628503 is a wasteful number, since it uses less digits than its factorization.

491628503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394321.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 491628503 is about 22172.6972423294. The cubic root of 491628503 is about 789.2459305654.

The spelling of 491628503 in words is "four hundred ninety-one million, six hundred twenty-eight thousand, five hundred three".