2899987 has 4 divisors (see below), whose sum is σ = 2919600. Its totient is φ = 2880376.

The previous prime is 2899943. The next prime is 2899991. The reversal of 2899987 is 7899982.

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 2899987 - 2⁷ = 2899859 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (2899907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9583 + ... + 9880.

It is an arithmetic number, because the mean of its divisors is an integer number (729900).

2^2899987 is an apocalyptic number.

2899987 is a deficient number, since it is larger than the sum of its proper divisors (19613).

2899987 is a wasteful number, since it uses less digits than its factorization.

2899987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19612.

The product of its digits is 653184, while the sum is 52.

The square root of 2899987 is about 1702.9348196569. The cubic root of 2899987 is about 142.6041016270.

The spelling of 2899987 in words is "two million, eight hundred ninety-nine thousand, nine hundred eighty-seven".