12987799 has 4 divisors (see below), whose sum is σ = 14168520. Its totient is φ = 11807080.

The previous prime is 12987797. The next prime is 12987829. The reversal of 12987799 is 99778921.

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 12987799 - 2¹ = 12987797 is a prime.

It is a super-3 number, since 3×12987799³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987797) 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, 590344 + ... + 590365.

It is an arithmetic number, because the mean of its divisors is an integer number (3542130).

Almost surely, 2^12987799 is an apocalyptic number.

12987799 is a deficient number, since it is larger than the sum of its proper divisors (1180721).

12987799 is a wasteful number, since it uses less digits than its factorization.

12987799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180720.

The product of its digits is 571536, while the sum is 52.

The square root of 12987799 is about 3603.8589040083. The cubic root of 12987799 is about 235.0598851456.

The spelling of 12987799 in words is "twelve million, nine hundred eighty-seven thousand, seven hundred ninety-nine".