797798591 has 4 divisors (see below), whose sum is σ = 798457512. Its totient is φ = 797139672.

The previous prime is 797798569. The next prime is 797798611. The reversal of 797798591 is 195897797.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-797798591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797798191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327641 + ... + 330066.

It is an arithmetic number, because the mean of its divisors is an integer number (199614378).

Almost surely, 2^797798591 is an apocalyptic number.

797798591 is a deficient number, since it is larger than the sum of its proper divisors (658921).

797798591 is a wasteful number, since it uses less digits than its factorization.

797798591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658920.

The product of its digits is 10001880, while the sum is 62.

The square root of 797798591 is about 28245.3286580277. The cubic root of 797798591 is about 927.4654815293.

The spelling of 797798591 in words is "seven hundred ninety-seven million, seven hundred ninety-eight thousand, five hundred ninety-one".