499621 has 2 divisors, whose sum is σ = 499622. Its totient is φ = 499620.

The previous prime is 499607. The next prime is 499633. The reversal of 499621 is 126994.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314721 + 184900 = 561^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 499621 - 2⁷ = 499493 is a prime.

It is a super-2 number, since 2×499621² = 499242287282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249810 + 249811.

It is an arithmetic number, because the mean of its divisors is an integer number (249811).

2⁴⁹⁹⁶²¹ is an apocalyptic number.

It is an amenable number.

499621 is a deficient number, since it is larger than the sum of its proper divisors (1).

499621 is an equidigital number, since it uses as much as digits as its factorization.

499621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 499621 is about 706.8387369125. The cubic root of 499621 is about 79.3499933626.

The spelling of 499621 in words is "four hundred ninety-nine thousand, six hundred twenty-one".