2799987 has 4 divisors (see below), whose sum is σ = 3733320. Its totient is φ = 1866656.

The previous prime is 2799977. The next prime is 2799989. The reversal of 2799987 is 7899972.

It is a happy number.

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 2799987 - 2¹⁰ = 2798963 is a prime.

It is a D-number.

2799987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2799989) 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, 466662 + ... + 466667.

It is an arithmetic number, because the mean of its divisors is an integer number (933330).

2^2799987 is an apocalyptic number.

2799987 is a deficient number, since it is larger than the sum of its proper divisors (933333).

2799987 is an equidigital number, since it uses as much as digits as its factorization.

2799987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933332.

The product of its digits is 571536, while the sum is 51.

The square root of 2799987 is about 1673.3161685707. The cubic root of 2799987 is about 140.9457565103.

The spelling of 2799987 in words is "two million, seven hundred ninety-nine thousand, nine hundred eighty-seven".