499994921 has 2 divisors, whose sum is σ = 499994922. Its totient is φ = 499994920.

The previous prime is 499994909. The next prime is 499994941. The reversal of 499994921 is 129499994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490135321 + 9859600 = 22139^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 499994921 - 2¹⁴ = 499978537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (499994941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249997460 + 249997461.

It is an arithmetic number, because the mean of its divisors is an integer number (249997461).

Almost surely, 2^499994921 is an apocalyptic number.

It is an amenable number.

499994921 is a deficient number, since it is larger than the sum of its proper divisors (1).

499994921 is an equidigital number, since it uses as much as digits as its factorization.

499994921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 56.

The square root of 499994921 is about 22360.5662048169. The cubic root of 499994921 is about 793.6978385050.

The spelling of 499994921 in words is "four hundred ninety-nine million, nine hundred ninety-four thousand, nine hundred twenty-one".