499969 has 2 divisors, whose sum is σ = 499970. Its totient is φ = 499968.

The previous prime is 499957. The next prime is 499973. The reversal of 499969 is 969994.

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., 288369 + 211600 = 537^2 + 460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499969 is a prime.

It is a super-2 number, since 2×499969² = 499938001922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (499979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249984 + 249985.

It is an arithmetic number, because the mean of its divisors is an integer number (249985).

2⁴⁹⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

499969 is a deficient number, since it is larger than the sum of its proper divisors (1).

499969 is an equidigital number, since it uses as much as digits as its factorization.

499969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 46.

The square root of 499969 is about 707.0848605366. The cubic root of 499969 is about 79.3684122501.

It can be divided in two parts, 49996 and 9, that added together give a palindrome (50005).

The spelling of 499969 in words is "four hundred ninety-nine thousand, nine hundred sixty-nine".