497683384021 has 2 divisors, whose sum is σ = 497683384022. Its totient is φ = 497683384020.

The previous prime is 497683384007. The next prime is 497683384031. The reversal of 497683384021 is 120483386794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275640750225 + 222042633796 = 525015^2 + 471214^2 .

It is a cyclic number.

It is not a de Polignac number, because 497683384021 - 2²⁷ = 497549166293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (497683384031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248841692010 + 248841692011.

It is an arithmetic number, because the mean of its divisors is an integer number (248841692011).

Almost surely, 2^497683384021 is an apocalyptic number.

It is an amenable number.

497683384021 is a deficient number, since it is larger than the sum of its proper divisors (1).

497683384021 is an equidigital number, since it uses as much as digits as its factorization.

497683384021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 497683384021 in words is "four hundred ninety-seven billion, six hundred eighty-three million, three hundred eighty-four thousand, twenty-one".