97898197 has 2 divisors, whose sum is σ = 97898198. Its totient is φ = 97898196.

The previous prime is 97898179. The next prime is 97898209. The reversal of 97898197 is 79189879.

Together with previous prime (97898179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96550276 + 1347921 = 9826^2 + 1161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97898197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97898147) 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, 48949098 + 48949099.

It is an arithmetic number, because the mean of its divisors is an integer number (48949099).

Almost surely, 2^97898197 is an apocalyptic number.

It is an amenable number.

97898197 is a deficient number, since it is larger than the sum of its proper divisors (1).

97898197 is an equidigital number, since it uses as much as digits as its factorization.

97898197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 58.

The square root of 97898197 is about 9894.3517726024. The cubic root of 97898197 is about 460.8839289123.

The spelling of 97898197 in words is "ninety-seven million, eight hundred ninety-eight thousand, one hundred ninety-seven".