2787047 has 4 divisors (see below), whose sum is σ = 2790480. Its totient is φ = 2783616.

The previous prime is 2787023. The next prime is 2787049. The reversal of 2787047 is 7407872.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2787047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2786998 and 2787016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2787049) 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, 263 + ... + 2375.

It is an arithmetic number, because the mean of its divisors is an integer number (697620).

2^2787047 is an apocalyptic number.

2787047 is a deficient number, since it is larger than the sum of its proper divisors (3433).

2787047 is a wasteful number, since it uses less digits than its factorization.

2787047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 2787047 is about 1669.4451173968. The cubic root of 2787047 is about 140.7282965819.

The spelling of 2787047 in words is "two million, seven hundred eighty-seven thousand, forty-seven".