97687488950209 has 2 divisors, whose sum is σ = 97687488950210. Its totient is φ = 97687488950208.

The previous prime is 97687488950173. The next prime is 97687488950231. The reversal of 97687488950209 is 90205988478679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95737849223184 + 1949639727025 = 9784572^2 + 1396295^2 .

It is a cyclic number.

It is not a de Polignac number, because 97687488950209 - 2³¹ = 97685341466561 is a prime.

It is a super-2 number, since 2×97687488950209² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97687488950299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48843744475104 + 48843744475105.

It is an arithmetic number, because the mean of its divisors is an integer number (48843744475105).

Almost surely, 2^{97687488950209} is an apocalyptic number.

It is an amenable number.

97687488950209 is a deficient number, since it is larger than the sum of its proper divisors (1).

97687488950209 is an equidigital number, since it uses as much as digits as its factorization.

97687488950209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4389396480, while the sum is 82.

The spelling of 97687488950209 in words is "ninety-seven trillion, six hundred eighty-seven billion, four hundred eighty-eight million, nine hundred fifty thousand, two hundred nine".