591098897 has 2 divisors, whose sum is σ = 591098898. Its totient is φ = 591098896.

The previous prime is 591098861. The next prime is 591098899. The reversal of 591098897 is 798890195.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332661121 + 258437776 = 18239^2 + 16076^2 .

It is a cyclic number.

It is not a de Polignac number, because 591098897 - 2¹⁰ = 591097873 is a prime.

Together with 591098899, 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 (591098899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295549448 + 295549449.

It is an arithmetic number, because the mean of its divisors is an integer number (295549449).

Almost surely, 2^591098897 is an apocalyptic number.

It is an amenable number.

591098897 is a deficient number, since it is larger than the sum of its proper divisors (1).

591098897 is an equidigital number, since it uses as much as digits as its factorization.

591098897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 56.

The square root of 591098897 is about 24312.5255166961. The cubic root of 591098897 is about 839.2410458657.

The spelling of 591098897 in words is "five hundred ninety-one million, ninety-eight thousand, eight hundred ninety-seven".