788661791 has 4 divisors (see below), whose sum is σ = 802029000. Its totient is φ = 775294584.

The previous prime is 788661779. The next prime is 788661827. The reversal of 788661791 is 197166887.

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

It is a cyclic number.

It is not a de Polignac number, because 788661791 - 2¹⁰ = 788660767 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 (788661751) 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 in 3 ways as a sum of consecutive naturals, for example, 6683516 + ... + 6683633.

It is an arithmetic number, because the mean of its divisors is an integer number (200507250).

Almost surely, 2^788661791 is an apocalyptic number.

788661791 is a deficient number, since it is larger than the sum of its proper divisors (13367209).

788661791 is a wasteful number, since it uses less digits than its factorization.

788661791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13367208.

The product of its digits is 1016064, while the sum is 53.

The square root of 788661791 is about 28083.1228854627. The cubic root of 788661791 is about 923.9112746118.

The spelling of 788661791 in words is "seven hundred eighty-eight million, six hundred sixty-one thousand, seven hundred ninety-one".