497260661 has 4 divisors (see below), whose sum is σ = 498067212. Its totient is φ = 496454112.

The previous prime is 497260639. The next prime is 497260663. The reversal of 497260661 is 166062794.

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 201214225 + 296046436 = 14185^2 + 17206^2 .

It is a cyclic number.

It is not a de Polignac number, because 497260661 - 2²⁶ = 430151797 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 (497260663) 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, 402350 + ... + 403583.

It is an arithmetic number, because the mean of its divisors is an integer number (124516803).

Almost surely, 2^497260661 is an apocalyptic number.

It is an amenable number.

497260661 is a deficient number, since it is larger than the sum of its proper divisors (806551).

497260661 is an equidigital number, since it uses as much as digits as its factorization.

497260661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806550.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 497260661 is about 22299.3421651851. The cubic root of 497260661 is about 792.2483942891.

The spelling of 497260661 in words is "four hundred ninety-seven million, two hundred sixty thousand, six hundred sixty-one".