1797904537997 has 2 divisors, whose sum is σ = 1797904537998. Its totient is φ = 1797904537996.

The previous prime is 1797904537921. The next prime is 1797904538009. The reversal of 1797904537997 is 7997354097971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969793617961 + 828110920036 = 984781^2 + 910006^2 .

It is a cyclic number.

It is not a de Polignac number, because 1797904537997 - 2¹⁰ = 1797904536973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1797904537907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 898952268998 + 898952268999.

It is an arithmetic number, because the mean of its divisors is an integer number (898952268999).

Almost surely, 2^{1797904537997} is an apocalyptic number.

It is an amenable number.

1797904537997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1797904537997 is an equidigital number, since it uses as much as digits as its factorization.

1797904537997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945177660, while the sum is 77.

The spelling of 1797904537997 in words is "one trillion, seven hundred ninety-seven billion, nine hundred four million, five hundred thirty-seven thousand, nine hundred ninety-seven".