497493281 has 2 divisors, whose sum is σ = 497493282. Its totient is φ = 497493280.

The previous prime is 497493259. The next prime is 497493299. The reversal of 497493281 is 182394794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338228881 + 159264400 = 18391^2 + 12620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-497493281 is a prime.

It is a super-2 number, since 2×497493281² = 494999129280289922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (497493211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248746640 + 248746641.

It is an arithmetic number, because the mean of its divisors is an integer number (248746641).

Almost surely, 2^497493281 is an apocalyptic number.

It is an amenable number.

497493281 is a deficient number, since it is larger than the sum of its proper divisors (1).

497493281 is an equidigital number, since it uses as much as digits as its factorization.

497493281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 497493281 is about 22304.5574042616. The cubic root of 497493281 is about 792.3719137400.

The spelling of 497493281 in words is "four hundred ninety-seven million, four hundred ninety-three thousand, two hundred eighty-one".