2787687449 has 4 divisors (see below), whose sum is σ = 2788168464. Its totient is φ = 2787206436.

The previous prime is 2787687443. The next prime is 2787687491. The reversal of 2787687449 is 9447867872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2787687449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2787687391 and 2787687400.

It is not an unprimeable number, because it can be changed into a prime (2787687443) 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, 231707 + ... + 243440.

It is an arithmetic number, because the mean of its divisors is an integer number (697042116).

Almost surely, 2^2787687449 is an apocalyptic number.

It is an amenable number.

2787687449 is a deficient number, since it is larger than the sum of its proper divisors (481015).

2787687449 is an equidigital number, since it uses as much as digits as its factorization.

2787687449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481014.

The product of its digits is 37933056, while the sum is 62.

The square root of 2787687449 is about 52798.5553684947. Note that the first 3 decimals coincide. The cubic root of 2787687449 is about 1407.3907530147.

The spelling of 2787687449 in words is "two billion, seven hundred eighty-seven million, six hundred eighty-seven thousand, four hundred forty-nine".