97938220909 has 2 divisors, whose sum is σ = 97938220910. Its totient is φ = 97938220908.

The previous prime is 97938220907. The next prime is 97938220931. The reversal of 97938220909 is 90902283979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97751898409 + 186322500 = 312653^2 + 13650^2 .

It is a cyclic number.

It is not a de Polignac number, because 97938220909 - 2¹ = 97938220907 is a prime.

It is a super-2 number, since 2×97938220909² (a number of 23 digits) contains 22 as substring.

Together with 97938220907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97938220907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48969110454 + 48969110455.

It is an arithmetic number, because the mean of its divisors is an integer number (48969110455).

Almost surely, 2^97938220909 is an apocalyptic number.

It is an amenable number.

97938220909 is a deficient number, since it is larger than the sum of its proper divisors (1).

97938220909 is an equidigital number, since it uses as much as digits as its factorization.

97938220909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 97938220909 in words is "ninety-seven billion, nine hundred thirty-eight million, two hundred twenty thousand, nine hundred nine".