492558809 has 4 divisors (see below), whose sum is σ = 493879716. Its totient is φ = 491237904.

The previous prime is 492558767. The next prime is 492558811. The reversal of 492558809 is 908855294.

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 84640000 + 407918809 = 9200^2 + 20197^2 .

It is a cyclic number.

It is not a de Polignac number, because 492558809 - 2²⁰ = 491510233 is a prime.

It is a super-2 number, since 2×492558809² = 485228360646996962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (492558889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659894 + ... + 660639.

It is an arithmetic number, because the mean of its divisors is an integer number (123469929).

Almost surely, 2^492558809 is an apocalyptic number.

It is an amenable number.

492558809 is a deficient number, since it is larger than the sum of its proper divisors (1320907).

492558809 is a wasteful number, since it uses less digits than its factorization.

492558809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320906.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The square root of 492558809 is about 22193.6659657660. The cubic root of 492558809 is about 789.7434455071.

The spelling of 492558809 in words is "four hundred ninety-two million, five hundred fifty-eight thousand, eight hundred nine".