97288309 has 2 divisors, whose sum is σ = 97288310. Its totient is φ = 97288308.

The previous prime is 97288291. The next prime is 97288313. The reversal of 97288309 is 90388279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96963409 + 324900 = 9847^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 97288309 - 2⁷ = 97288181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97288339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48644154 + 48644155.

It is an arithmetic number, because the mean of its divisors is an integer number (48644155).

Almost surely, 2^97288309 is an apocalyptic number.

It is an amenable number.

97288309 is a deficient number, since it is larger than the sum of its proper divisors (1).

97288309 is an equidigital number, since it uses as much as digits as its factorization.

97288309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 97288309 is about 9863.4836138152. The cubic root of 97288309 is about 459.9248601275.

The spelling of 97288309 in words is "ninety-seven million, two hundred eighty-eight thousand, three hundred nine".