491940503 has 8 divisors (see below), whose sum is σ = 501867408. Its totient is φ = 482099904.

The previous prime is 491940499. The next prime is 491940517. The reversal of 491940503 is 305049194.

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 491940503 - 2² = 491940499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491940523) 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, 10001 + ... + 32922.

It is an arithmetic number, because the mean of its divisors is an integer number (62733426).

Almost surely, 2^491940503 is an apocalyptic number.

491940503 is a deficient number, since it is larger than the sum of its proper divisors (9926905).

491940503 is a wasteful number, since it uses less digits than its factorization.

491940503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43153.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 491940503 is about 22179.7318063136. The cubic root of 491940503 is about 789.4128537986.

Adding to 491940503 its reverse (305049194), we get a palindrome (796989697).

The spelling of 491940503 in words is "four hundred ninety-one million, nine hundred forty thousand, five hundred three".