497909 has 4 divisors (see below), whose sum is σ = 511404. Its totient is φ = 484416.

The previous prime is 497899. The next prime is 497929. The reversal of 497909 is 909794.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 483025 + 14884 = 695^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 497909 - 2¹² = 493813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497929) 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, 6692 + ... + 6765.

It is an arithmetic number, because the mean of its divisors is an integer number (127851).

2⁴⁹⁷⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

497909 is a deficient number, since it is larger than the sum of its proper divisors (13495).

497909 is a wasteful number, since it uses less digits than its factorization.

497909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13494.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 497909 is about 705.6266718315. The cubic root of 497909 is about 79.2592561510.

The spelling of 497909 in words is "four hundred ninety-seven thousand, nine hundred nine".