97785089 has 2 divisors, whose sum is σ = 97785090. Its totient is φ = 97785088.

The previous prime is 97785073. The next prime is 97785091. The reversal of 97785089 is 98058779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60575089 + 37210000 = 7783^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 97785089 - 2⁴ = 97785073 is a prime.

Together with 97785091, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97785089.

It is not a weakly prime, because it can be changed into another prime (97785019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48892544 + 48892545.

It is an arithmetic number, because the mean of its divisors is an integer number (48892545).

Almost surely, 2^97785089 is an apocalyptic number.

It is an amenable number.

97785089 is a deficient number, since it is larger than the sum of its proper divisors (1).

97785089 is an equidigital number, since it uses as much as digits as its factorization.

97785089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 97785089 is about 9888.6343344266. The cubic root of 97785089 is about 460.7063643600.

The spelling of 97785089 in words is "ninety-seven million, seven hundred eighty-five thousand, eighty-nine".