497423809 has 3 divisors (see below), whose sum is σ = 497446113. Its totient is φ = 497401506.

The previous prime is 497423807. The next prime is 497423827. The reversal of 497423809 is 908324794.

It is a happy number.

The square root of 497423809 is 22303.

It is a perfect power (a square), and thus also a powerful number.

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 is not a de Polignac number, because 497423809 - 2¹ = 497423807 is a prime.

It is a super-3 number, since 3×497423809³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (497423807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11152 + ... + 33454.

It is an arithmetic number, because the mean of its divisors is an integer number (165815371).

Almost surely, 2^497423809 is an apocalyptic number.

497423809 is the 22303-rd square number.

497423809 is the 11152-nd centered octagonal number.

It is an amenable number.

497423809 is a deficient number, since it is larger than the sum of its proper divisors (22304).

497423809 is an frugal number, since it uses more digits than its factorization.

497423809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44606 (or 22303 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The cubic root of 497423809 is about 792.3350286696.

The spelling of 497423809 in words is "four hundred ninety-seven million, four hundred twenty-three thousand, eight hundred nine".