497869209 has 12 divisors (see below), whose sum is σ = 719862052. Its totient is φ = 331581600.

The previous prime is 497869189. The next prime is 497869213. The reversal of 497869209 is 902968794.

It can be written as a sum of positive squares in 2 ways, for example, as 101062809 + 396806400 = 10053^2 + 19920^2 .

It is not a de Polignac number, because 497869209 - 2¹⁵ = 497836441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (497869289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17902 + ... + 36279.

Almost surely, 2^497869209 is an apocalyptic number.

It is an amenable number.

497869209 is a deficient number, since it is larger than the sum of its proper divisors (221992843).

497869209 is a wasteful number, since it uses less digits than its factorization.

497869209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55208 (or 55205 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 497869209 is about 22312.9829695628. The cubic root of 497869209 is about 792.5714472831.

The spelling of 497869209 in words is "four hundred ninety-seven million, eight hundred sixty-nine thousand, two hundred nine".