97788389 has 2 divisors, whose sum is σ = 97788390. Its totient is φ = 97788388.

The previous prime is 97788367. The next prime is 97788419. The reversal of 97788389 is 98388779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81450625 + 16337764 = 9025^2 + 4042^2 .

It is a cyclic number.

It is not a de Polignac number, because 97788389 - 2²⁰ = 96739813 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97788289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48894194 + 48894195.

It is an arithmetic number, because the mean of its divisors is an integer number (48894195).

Almost surely, 2^97788389 is an apocalyptic number.

It is an amenable number.

97788389 is a deficient number, since it is larger than the sum of its proper divisors (1).

97788389 is an equidigital number, since it uses as much as digits as its factorization.

97788389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 59.

The square root of 97788389 is about 9888.8011912466. The cubic root of 97788389 is about 460.7115468608.

The spelling of 97788389 in words is "ninety-seven million, seven hundred eighty-eight thousand, three hundred eighty-nine".