499919503 has 4 divisors (see below), whose sum is σ = 500499648. Its totient is φ = 499339360.

The previous prime is 499919491. The next prime is 499919509. The reversal of 499919503 is 305919994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305919994 = 2 ⋅152959997.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499919503 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499919509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288778 + ... + 290503.

It is an arithmetic number, because the mean of its divisors is an integer number (125124912).

Almost surely, 2^499919503 is an apocalyptic number.

499919503 is a deficient number, since it is larger than the sum of its proper divisors (580145).

499919503 is an equidigital number, since it uses as much as digits as its factorization.

499919503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580144.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 499919503 is about 22358.8797349062. The cubic root of 499919503 is about 793.6579300240.

The spelling of 499919503 in words is "four hundred ninety-nine million, nine hundred nineteen thousand, five hundred three".