97240009 has 2 divisors, whose sum is σ = 97240010. Its totient is φ = 97240008.

The previous prime is 97240007. The next prime is 97240027. The reversal of 97240009 is 90004279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55830784 + 41409225 = 7472^2 + 6435^2 .

It is a cyclic number.

It is not a de Polignac number, because 97240009 - 2¹ = 97240007 is a prime.

Together with 97240007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (97240007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48620004 + 48620005.

It is an arithmetic number, because the mean of its divisors is an integer number (48620005).

Almost surely, 2^97240009 is an apocalyptic number.

It is an amenable number.

97240009 is a deficient number, since it is larger than the sum of its proper divisors (1).

97240009 is an equidigital number, since it uses as much as digits as its factorization.

97240009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 97240009 is about 9861.0348848384. The cubic root of 97240009 is about 459.8487357086.

The spelling of 97240009 in words is "ninety-seven million, two hundred forty thousand, nine".