499869169 has 4 divisors (see below), whose sum is σ = 499918500. Its totient is φ = 499819840.

The previous prime is 499869163. The next prime is 499869187. The reversal of 499869169 is 961968994.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 401601600 + 98267569 = 20040^2 + 9913^2 .

It is a cyclic number.

It is not a de Polignac number, because 499869169 - 2⁹ = 499868657 is a prime.

It is a super-2 number, since 2×499869169² = 499738372233501122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499869163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3292 + ... + 31789.

It is an arithmetic number, because the mean of its divisors is an integer number (124979625).

Almost surely, 2^499869169 is an apocalyptic number.

It is an amenable number.

499869169 is a deficient number, since it is larger than the sum of its proper divisors (49331).

499869169 is a wasteful number, since it uses less digits than its factorization.

499869169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49330.

The product of its digits is 7558272, while the sum is 61.

The square root of 499869169 is about 22357.7541135061. The cubic root of 499869169 is about 793.6312928562.

The spelling of 499869169 in words is "four hundred ninety-nine million, eight hundred sixty-nine thousand, one hundred sixty-nine".