97783109 has 2 divisors, whose sum is σ = 97783110. Its totient is φ = 97783108.

The previous prime is 97783093. The next prime is 97783111. The reversal of 97783109 is 90138779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52852900 + 44930209 = 7270^2 + 6703^2 .

It is a cyclic number.

It is not a de Polignac number, because 97783109 - 2⁴ = 97783093 is a prime.

It is a Sophie Germain prime.

Together with 97783111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 97783109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97783129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48891554 + 48891555.

It is an arithmetic number, because the mean of its divisors is an integer number (48891555).

Almost surely, 2^97783109 is an apocalyptic number.

It is an amenable number.

97783109 is a deficient number, since it is larger than the sum of its proper divisors (1).

97783109 is an equidigital number, since it uses as much as digits as its factorization.

97783109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 97783109 is about 9888.5342189831. The cubic root of 97783109 is about 460.7032548035.

The spelling of 97783109 in words is "ninety-seven million, seven hundred eighty-three thousand, one hundred nine".