499409 has 8 divisors (see below), whose sum is σ = 547560. Its totient is φ = 453376.

The previous prime is 499403. The next prime is 499423. The reversal of 499409 is 904994.

It can be written as a sum of positive squares in 4 ways, for example, as 16384 + 483025 = 128^2 + 695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499409 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14 + ... + 999.

It is an arithmetic number, because the mean of its divisors is an integer number (68445).

2⁴⁹⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

499409 is a deficient number, since it is larger than the sum of its proper divisors (48151).

499409 is a wasteful number, since it uses less digits than its factorization.

499409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 499409 is about 706.6887575163. The cubic root of 499409 is about 79.3387684685.

It can be divided in two parts, 49 and 9409, that multiplied together give a square (461041 = 679²).

The spelling of 499409 in words is "four hundred ninety-nine thousand, four hundred nine".