97668149 has 2 divisors, whose sum is σ = 97668150. Its totient is φ = 97668148.

The previous prime is 97668139. The next prime is 97668157. The reversal of 97668149 is 94186679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84309124 + 13359025 = 9182^2 + 3655^2 .

It is a cyclic number.

It is not a de Polignac number, because 97668149 - 2²⁴ = 80890933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 97668097 and 97668106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97668119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48834074 + 48834075.

It is an arithmetic number, because the mean of its divisors is an integer number (48834075).

Almost surely, 2^97668149 is an apocalyptic number.

It is an amenable number.

97668149 is a deficient number, since it is larger than the sum of its proper divisors (1).

97668149 is an equidigital number, since it uses as much as digits as its factorization.

97668149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 97668149 is about 9882.7197167581. The cubic root of 97668149 is about 460.5226400545.

The spelling of 97668149 in words is "ninety-seven million, six hundred sixty-eight thousand, one hundred forty-nine".