497138997917 has 2 divisors, whose sum is σ = 497138997918. Its totient is φ = 497138997916.

The previous prime is 497138997821. The next prime is 497138997947. The reversal of 497138997917 is 719799831794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496262482681 + 876515236 = 704459^2 + 29606^2 .

It is a cyclic number.

It is not a de Polignac number, because 497138997917 - 2¹⁸ = 497138735773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (497138997947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248569498958 + 248569498959.

It is an arithmetic number, because the mean of its divisors is an integer number (248569498959).

Almost surely, 2^497138997917 is an apocalyptic number.

It is an amenable number.

497138997917 is a deficient number, since it is larger than the sum of its proper divisors (1).

497138997917 is an equidigital number, since it uses as much as digits as its factorization.

497138997917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216040608, while the sum is 74.

The spelling of 497138997917 in words is "four hundred ninety-seven billion, one hundred thirty-eight million, nine hundred ninety-seven thousand, nine hundred seventeen".