97920491097 has 24 divisors (see below), whose sum is σ = 154547966272. Its totient is φ = 54780691680.

The previous prime is 97920491087. The next prime is 97920491131. The reversal of 97920491097 is 79019402979.

It is not a de Polignac number, because 97920491097 - 2⁶ = 97920491033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97920491057) 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 in 23 ways as a sum of consecutive naturals, for example, 10370413 + ... + 10379850.

Almost surely, 2^97920491097 is an apocalyptic number.

It is an amenable number.

97920491097 is a deficient number, since it is larger than the sum of its proper divisors (56627475175).

97920491097 is a wasteful number, since it uses less digits than its factorization.

97920491097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20750301 (or 20750290 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 57.

The spelling of 97920491097 in words is "ninety-seven billion, nine hundred twenty million, four hundred ninety-one thousand, ninety-seven".