2987823 has 4 divisors (see below), whose sum is σ = 3983768. Its totient is φ = 1991880.

The previous prime is 2987821. The next prime is 2987827. The reversal of 2987823 is 3287892.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2987823 - 2¹ = 2987821 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2987821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497968 + ... + 497973.

It is an arithmetic number, because the mean of its divisors is an integer number (995942).

2^2987823 is an apocalyptic number.

2987823 is a deficient number, since it is larger than the sum of its proper divisors (995945).

2987823 is an equidigital number, since it uses as much as digits as its factorization.

2987823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995944.

The product of its digits is 48384, while the sum is 39.

The square root of 2987823 is about 1728.5320361509. The cubic root of 2987823 is about 144.0295560474.

The spelling of 2987823 in words is "two million, nine hundred eighty-seven thousand, eight hundred twenty-three".