499521823 has 2 divisors, whose sum is σ = 499521824. Its totient is φ = 499521822.

The previous prime is 499521787. The next prime is 499521833. The reversal of 499521823 is 328125994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499521823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 499521823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499521833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249760911 + 249760912.

It is an arithmetic number, because the mean of its divisors is an integer number (249760912).

Almost surely, 2^499521823 is an apocalyptic number.

499521823 is a deficient number, since it is larger than the sum of its proper divisors (1).

499521823 is an equidigital number, since it uses as much as digits as its factorization.

499521823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 499521823 is about 22349.9848545810. The cubic root of 499521823 is about 793.4474257249.

The spelling of 499521823 in words is "four hundred ninety-nine million, five hundred twenty-one thousand, eight hundred twenty-three".