997263008537 has 2 divisors, whose sum is σ = 997263008538. Its totient is φ = 997263008536.

The previous prime is 997263008503. The next prime is 997263008591. The reversal of 997263008537 is 735800362799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 936977536576 + 60285471961 = 967976^2 + 245531^2 .

It is a cyclic number.

It is not a de Polignac number, because 997263008537 - 2¹⁴ = 997262992153 is a prime.

It is not a weakly prime, because it can be changed into another prime (997263028537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498631504268 + 498631504269.

It is an arithmetic number, because the mean of its divisors is an integer number (498631504269).

Almost surely, 2^997263008537 is an apocalyptic number.

It is an amenable number.

997263008537 is a deficient number, since it is larger than the sum of its proper divisors (1).

997263008537 is an equidigital number, since it uses as much as digits as its factorization.

997263008537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17146080, while the sum is 59.

The spelling of 997263008537 in words is "nine hundred ninety-seven billion, two hundred sixty-three million, eight thousand, five hundred thirty-seven".