797805987 has 16 divisors (see below), whose sum is σ = 1197880320. Its totient is φ = 467920800.

The previous prime is 797805923. The next prime is 797806021. The reversal of 797805987 is 789508797.

It is not a de Polignac number, because 797805987 - 2⁶ = 797805923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 797805987.

It is not an unprimeable number, because it can be changed into a prime (797805287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388912 + ... + 390957.

It is an arithmetic number, because the mean of its divisors is an integer number (74867520).

Almost surely, 2^797805987 is an apocalyptic number.

797805987 is a deficient number, since it is larger than the sum of its proper divisors (400074333).

797805987 is a wasteful number, since it uses less digits than its factorization.

797805987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779914.

The product of its (nonzero) digits is 8890560, while the sum is 60.

The square root of 797805987 is about 28245.4595820284. The cubic root of 797805987 is about 927.4683475466.

The spelling of 797805987 in words is "seven hundred ninety-seven million, eight hundred five thousand, nine hundred eighty-seven".