500549891 has 2 divisors, whose sum is σ = 500549892. Its totient is φ = 500549890.

The previous prime is 500549879. The next prime is 500549993. The reversal of 500549891 is 198945005.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-500549891 is a prime.

It is a super-2 number, since 2×500549891² = 501100386760223762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (500549191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250274945 + 250274946.

It is an arithmetic number, because the mean of its divisors is an integer number (250274946).

Almost surely, 2^500549891 is an apocalyptic number.

500549891 is a deficient number, since it is larger than the sum of its proper divisors (1).

500549891 is an equidigital number, since it uses as much as digits as its factorization.

500549891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 500549891 is about 22372.9723327054. The cubic root of 500549891 is about 793.9913852335.

The spelling of 500549891 in words is "five hundred million, five hundred forty-nine thousand, eight hundred ninety-one".