591968897 has 4 divisors (see below), whose sum is σ = 637504980. Its totient is φ = 546432816.

The previous prime is 591968879. The next prime is 591968903. The reversal of 591968897 is 798869195.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 174134416 + 417834481 = 13196^2 + 20441^2 .

It is a cyclic number.

It is not a de Polignac number, because 591968897 - 2²⁰ = 590920321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (591968837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22768022 + ... + 22768047.

It is an arithmetic number, because the mean of its divisors is an integer number (159376245).

Almost surely, 2^591968897 is an apocalyptic number.

It is an amenable number.

591968897 is a deficient number, since it is larger than the sum of its proper divisors (45536083).

591968897 is a wasteful number, since it uses less digits than its factorization.

591968897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45536082.

The product of its digits is 9797760, while the sum is 62.

The square root of 591968897 is about 24330.4109500847. The cubic root of 591968897 is about 839.6525854525.

The spelling of 591968897 in words is "five hundred ninety-one million, nine hundred sixty-eight thousand, eight hundred ninety-seven".