499964221 has 2 divisors, whose sum is σ = 499964222. Its totient is φ = 499964220.

The previous prime is 499964183. The next prime is 499964273. The reversal of 499964221 is 122469994.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256448196 + 243516025 = 16014^2 + 15605^2 .

It is a cyclic number.

It is not a de Polignac number, because 499964221 - 2²⁵ = 466409789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499904221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249982110 + 249982111.

It is an arithmetic number, because the mean of its divisors is an integer number (249982111).

Almost surely, 2^499964221 is an apocalyptic number.

It is an amenable number.

499964221 is a deficient number, since it is larger than the sum of its proper divisors (1).

499964221 is an equidigital number, since it uses as much as digits as its factorization.

499964221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 499964221 is about 22359.8797179234. The cubic root of 499964221 is about 793.6815936584.

The spelling of 499964221 in words is "four hundred ninety-nine million, nine hundred sixty-four thousand, two hundred twenty-one".