97170975997 has 2 divisors, whose sum is σ = 97170975998. Its totient is φ = 97170975996.

The previous prime is 97170975917. The next prime is 97170976013. The reversal of 97170975997 is 79957907179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94080839076 + 3090136921 = 306726^2 + 55589^2 .

It is an emirp because it is prime and its reverse (79957907179) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97170975997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97170975917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48585487998 + 48585487999.

It is an arithmetic number, because the mean of its divisors is an integer number (48585487999).

Almost surely, 2^97170975997 is an apocalyptic number.

It is an amenable number.

97170975997 is a deficient number, since it is larger than the sum of its proper divisors (1).

97170975997 is an equidigital number, since it uses as much as digits as its factorization.

97170975997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78764805, while the sum is 70.

The spelling of 97170975997 in words is "ninety-seven billion, one hundred seventy million, nine hundred seventy-five thousand, nine hundred ninety-seven".