798987487321 has 9 divisors (see below), whose sum is σ = 802093129149. Its totient is φ = 795893834400.

The previous prime is 798987487307. The next prime is 798987487367. The reversal of 798987487321 is 123784789897.

The square root of 798987487321 is 893861.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 83440677321 + 715546810000 = 288861^2 + 845900^2 .

It is not a de Polignac number, because 798987487321 - 2¹⁷ = 798987356249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (798987487121) 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 8 ways as a sum of consecutive naturals, for example, 251173351 + ... + 251176531.

Almost surely, 2^798987487321 is an apocalyptic number.

798987487321 is the 893861-st square number.

798987487321 is the 446931-st centered octagonal number.

It is an amenable number.

798987487321 is a deficient number, since it is larger than the sum of its proper divisors (3105641828).

798987487321 is an frugal number, since it uses more digits than its factorization.

798987487321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6924 (or 3462 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 73.

The spelling of 798987487321 in words is "seven hundred ninety-eight billion, nine hundred eighty-seven million, four hundred eighty-seven thousand, three hundred twenty-one".