499967621 has 2 divisors, whose sum is σ = 499967622. Its totient is φ = 499967620.

The previous prime is 499967581. The next prime is 499967641. The reversal of 499967621 is 126769994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410872900 + 89094721 = 20270^2 + 9439^2 .

It is a cyclic number.

It is not a de Polignac number, because 499967621 - 2¹⁸ = 499705477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499967641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249983810 + 249983811.

It is an arithmetic number, because the mean of its divisors is an integer number (249983811).

Almost surely, 2^499967621 is an apocalyptic number.

It is an amenable number.

499967621 is a deficient number, since it is larger than the sum of its proper divisors (1).

499967621 is an equidigital number, since it uses as much as digits as its factorization.

499967621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The square root of 499967621 is about 22359.9557468256. The cubic root of 499967621 is about 793.6833927947.

The spelling of 499967621 in words is "four hundred ninety-nine million, nine hundred sixty-seven thousand, six hundred twenty-one".