497481209 has 2 divisors, whose sum is σ = 497481210. Its totient is φ = 497481208.

The previous prime is 497481163. The next prime is 497481221. The reversal of 497481209 is 902184794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366607609 + 130873600 = 19147^2 + 11440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-497481209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 497481209.

It is not a weakly prime, because it can be changed into another prime (497481269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248740604 + 248740605.

It is an arithmetic number, because the mean of its divisors is an integer number (248740605).

Almost surely, 2^497481209 is an apocalyptic number.

It is an amenable number.

497481209 is a deficient number, since it is larger than the sum of its proper divisors (1).

497481209 is an equidigital number, since it uses as much as digits as its factorization.

497481209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 497481209 is about 22304.2867852796. The cubic root of 497481209 is about 792.3655045472.

The spelling of 497481209 in words is "four hundred ninety-seven million, four hundred eighty-one thousand, two hundred nine".