97895209 has 2 divisors, whose sum is σ = 97895210. Its totient is φ = 97895208.

The previous prime is 97895207. The next prime is 97895221. The reversal of 97895209 is 90259879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83997225 + 13897984 = 9165^2 + 3728^2 .

It is a cyclic number.

It is not a de Polignac number, because 97895209 - 2¹ = 97895207 is a prime.

Together with 97895207, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97895207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48947604 + 48947605.

It is an arithmetic number, because the mean of its divisors is an integer number (48947605).

Almost surely, 2^97895209 is an apocalyptic number.

It is an amenable number.

97895209 is a deficient number, since it is larger than the sum of its proper divisors (1).

97895209 is an equidigital number, since it uses as much as digits as its factorization.

97895209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 97895209 is about 9894.2007762123. The cubic root of 97895209 is about 460.8792399080.

The spelling of 97895209 in words is "ninety-seven million, eight hundred ninety-five thousand, two hundred nine".