499961669 has 2 divisors, whose sum is σ = 499961670. Its totient is φ = 499961668.

The previous prime is 499961659. The next prime is 499961681. The reversal of 499961669 is 966169994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498941569 + 1020100 = 22337^2 + 1010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499961669 is a prime.

It is a super-2 number, since 2×499961669² = 499923340938531122, 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 (499961659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249980834 + 249980835.

It is an arithmetic number, because the mean of its divisors is an integer number (249980835).

Almost surely, 2^499961669 is an apocalyptic number.

It is an amenable number.

499961669 is a deficient number, since it is larger than the sum of its proper divisors (1).

499961669 is an equidigital number, since it uses as much as digits as its factorization.

499961669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5668704, while the sum is 59.

The square root of 499961669 is about 22359.8226513539. The cubic root of 499961669 is about 793.6802432425.

The spelling of 499961669 in words is "four hundred ninety-nine million, nine hundred sixty-one thousand, six hundred sixty-nine".