499649 has 2 divisors, whose sum is σ = 499650. Its totient is φ = 499648.

The previous prime is 499637. The next prime is 499661. The reversal of 499649 is 946994.

It is a balanced prime because it is at equal distance from previous prime (499637) and next prime (499661).

It can be written as a sum of positive squares in only one way, i.e., 462400 + 37249 = 680^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 499649 - 2⁴ = 499633 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (499669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249824 + 249825.

It is an arithmetic number, because the mean of its divisors is an integer number (249825).

2⁴⁹⁹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

499649 is a deficient number, since it is larger than the sum of its proper divisors (1).

499649 is an equidigital number, since it uses as much as digits as its factorization.

499649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 499649 is about 706.8585431329. The cubic root of 499649 is about 79.3514756584.

The spelling of 499649 in words is "four hundred ninety-nine thousand, six hundred forty-nine".